We found 15 water bottles to keep you hydrated while being kinder to the environment
Rebecca Astill
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UK consumers go through an estimated 14 billion plastic drinks bottles per year, according to Defra, but single-use plastic is falling out of favour thanks to efforts from David Attenborough and Greta Thunberg. More people are turning to reusable water bottles and in return, bottles are getting smarter. The best water bottles these days are insulated, leak-proof, filtered and BPA free.
BPA stands for Bisphenol A, an industrial chemical compound used in the manufacturing of strong plastics. Some research suggests BPA can leak into food and drink and cause health problems. “When looking for a bottle, look for non-toxic materials. Stainless steel is one of the most eco-friendly materials for a water bottle. Not only is it safe, but it is very durable and infinitely recyclable,” says Natalie Byrne, content marketing manager at Go Outdoors.
For this guide I’ve tried and tested a number of the best water bottles on the market - including gym water bottles, water bottles with straws, and even the Air Up water bottle which uses scented pods to trick your brain into thinking you’re drinking squash (when in fact, it’s just water). Genius.
Our expert Natalie Byrne from Go Outdoors has also helped to answer frequently asked questions, like how to choose an environmentally friendly water bottle, how to clean one, and how long you can keep water in one. If you’re in a hurry, here’s a quick look at my top five:
Which is the best water bottle in 2024? At a glance
- Best water bottle - Chilly’s Series 2
- Best value water bottle - SHO Original 2.0
- Best water bottle to keep drinks cold - Stanley Go Quick Flip Water Bottle
- Best water bottle with a straw - Hydroflask
- Best insulated water bottle - Yeti Rambler
What should you look for when shopping for a water bottle?
“It is important to think about what you will be using the bottle for, as well as the materials used and if they are environmentally friendly,” says Byrne. She notes that the main reason people choose to buy a reusable water bottle is to cut down on single-use plastic and help the environment, so it makes sense to choose a bottle that is environmentally friendly, like the plant-based S’wheat bottle.
You might want to prioritise different features based on what you’ll be using your water bottle for the most. If it’s for the gym, choose a durable bottle with ergonomic curves like the Owala FreeSip Water Bottle. If it’s for on-the-go, ensure it’s leakproof like the Chilly’s Series 2. If you want to use it for hot drinks as well, opt for a stainless steel insulated bottle like the Yeti Rambler.
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How I tested the best water bottles
To find the best water bottle, I tried and tested dozens over the period of a month. I threw them in my rucksack on my daily commute to test if they were leak-proof and I sipped them at my desk. I bundled them into my gym bag along with my gym leggings and yoga mat and even took them on runs. I left them for hours at a time to test how insulated they really were, both for cold and hot water, and I deep-dived into the materials each is made from to check for toxic materials.
I also looked at value for money. You wouldn’t believe the cost of some water bottles I looked at. Here is what I found, starting with my favourite.
Best water bottles
1. Chilly’s Series 2 Bottle
£32 for 500ml bottle, Chilly’s
Best water bottle, 9/10
We like: it’s simple, durable and stylish
We don’t like: the rubber bottom may quickly peel away
- Available in 350ml, 500ml or 1l
- Leak-proof
- Not dishwasher safe
- BPA free stainless steel with powder coated body, silicone base and plastic lid
- Claims to keep drinks cold for 24 hours, hot for 12
I’m a long time fan of Chilly’s Original Bottle and I’ll admit I was dismissive when the Series 2 bottles first came out. They’re objectively less attractive than the classic design of the Series 1, with a more rugged, squat appearance and a loop handle. But I’m here to tell you I’m a convert.
While I maintain there has been a decline in aesthetics, everything that I disliked about the Original has been rectified here. The Original has a ridged bottom which is noisy and wobbles if a table is knocked, whereas the Series 2 has a flat silicone base which grips any surface and is quiet to set down. The loop on the handle makes it far easier to carry, and the antimicrobial neck keeps it cleaner for longer.
The lip, for me, is well sized. If it’s too large, you risk spilling water all over you clothes;too small andit’s not a comfortable fit for the mouth. Chilly’s is just right. I also find that, while some steel bottles can leave a slight lingering metallic flavour, these ones don’t. I like the textured feel of the bottle, which makes it a little less slippery than some steel options and prevents it feeling too cold or hot to the touch. Water stays hot for a long time –though I’m not sure about the 12 hours claim –and remains cold throughout the day;ideal if you’re on a long walk or a hike.
But nothing is perfect, and unfortunately the silicone base started peeling away after only a few uses. I imagine it’s easily superglued, but it’s annoying I should have to consider that. Other than that, it’s an evolution from the Chilly’s Original bottle and I’d recommend it to anyone after a durable, sporty or office water bottle.
£32
Price at
Chilly's
2. SHO Original 2.0
£14.99 for 500ml bottle, Amazon
Best value water bottle, 8/10
We like: the no frills attitude which prioritises insulation and quality
We don’t like: it’s not very exciting
- Available in 260ml, 500ml, 750ml, 1l, 1.7l
- Leak-proof
- Not dishwasher safe
- BPA free stainless steel
- Claims to keep drinks cold for 24 hours, hot for 12
Some of the bottles on this list are reasonably expensive when all you’re really after is a vessel to hold water. Enter: Sho. Sho takes an unadorned attitude to water bottles, doing the simple things well. The Original 2.0 bottles are insulated, attractive and have interchangeable lids.
I have both the regular and the Straw Lid, which is designed for sports. Sho advises that the Straw Lid is not 100 per cent leak proof, though I haven’t found that to be an issue. One thing I have found is that the straw is stiff to pop up - not too dissimilar from the Hydro Flask below.
There’s really not too much to say about the Sho bottle because it is so simplistic - but with that comes an affordable price and a focus on the most important features. It’s durable, well insulated and leak-proof.
£14.99
Price at
Amazon
3. Stanley Go Quick Flip Water Bottle
£33.99 for 700ml bottle, Stanley
Best water bottle to keep drinks cold, 9/10
We like: the lid, which seems to simple but has thought of everything
We don’t like: the button to open the lid very occasionally gets stuck
- Available in 470ml, 700ml and 1.06l
- Leak-proof
- Dishwasher safe
- BPA free stainless steel and plastic lid
- Claims to keep drinks cold for 12 hours
Old school favourite Stanley is now popular amongst Gen Z as well as older generations, thanks to a bout of viral fame for their constantly sold-out giant tumbler, which I review below. This Go Quick Flip may not be the darling of Tiktok, but it’s the one I’d choose.
It promises to retain the temperature of cold drinks for 12 hours and iced drinks for 40 and I’ve also found it to be an excellent option for a keeping my morning cuppa warm. Thanks to the leak-proof design, I can make my tea at home and throw it in my rucksack as I get the train to work and it’s still warm the other side.
The bottle cap operates via a big button which snaps open the lid. When shut, it can be secured with a metal ring which folds over the button and clicks into place with a satisfying clack. What can’t be seen in the image above is a square looped handle for easy carrying.
Occasionally, the lid’s button didn’t snap the lid open straightaway and it’s definitely bulkier than the Chilly’s above, designed with hiking and adventure at the forefront. But it’s a sturdy, well-insulated bottle that – unlike the gigantic Stanley Quencher – is adaptable for just about every situation.
£33.99
Price at
Stanley
4. Hydro Flask with Flex Straw Cap
Best water bottle with straw, 9/10
We like: it’s easy to clean
We don’t like: the straw is stiff to flip up
- Available in 532ml, 621ml and 710ml
- Leak-proof
- Dishwasher safe
- BPA free stainless steel and plastic lid
- Claims to keep drinks cold for 24 hours, hot for 12
I’m generally against water bottles with straws, I find them unhygienic and difficult to clean. This Hydro Flask has changed my mind. My bottle arrived with the standard cap but I ordered the Flex Straw Cap separately to try it out. It arrives in a pack with two straws, which you trim to fit the size of your bottle and fit into the lid.
It was easy enough to do, although I do wish it would come already put together as it was tricky judging the height at which to cut the straw. The lid has a flexible insert which connects the straw and can be removed for easy cleaning. The straw itself can be thrown into the dishwasher which put my mind at ease, hygiene wise.
Looks wise I can’t complain either. The Hydro Flask features a compact design with a powdered coating and a choice of nine colours. My favourite was the rain colour, a pale blue. The bottom is slightly indented in the middle for a stable base and after a month of using it, I can confirm it’s durable and keeps water ice cold.
My one gripe is that the lid is stiff to operate - meaning anyone with joint issues or frail hands will struggle. The straw takes a lot of force to pull open so I’ve ended up just leaving it up if I’m sat with the bottle at my desk. If you’re up to the challenge of prying open the straw every time you want a sip - this is your bottle. And if you’d rather it without the straw, you can buy the regular flex-cap version instead.
£34.99
Price at
Amazon
5. Ocean Bottle
£35 for 500ml bottle, Ocean Bottle
Best water bottle supporting marine life
We like: the company’s great ocean conservation work
We don’t like: it’s quite expensive
- Available in 500ml
- Leak-proof
- Dishwasher safe
- Recycled stainless steel, BPA free and ocean bound plastic
- Claims to keep drinks cold for 18 hours and hot for nine
With the sale of each Ocean Bottle, 1,000 plastic bottles are collected before they reach the ocean. So you can feel a sense of smugness when you buy one, but are they actually any good? Yes they are.
First of all, it looks beautiful sitting on my office desk. The lid screws off in two places, firstly around three quarters of the way up for cup-style drinking and adding ice and secondly at the cap, for drinking on the go. The carry loop is also handy.
I love the whole ethos of this water bottle and the way every feature seems so carefully considered. I just wish the cap had a stainless steel insert for better insulation.
£35
Price at
Ocean Bottle
6. Lululemon Back to Life Sport Bottle
£38 for 710ml bottle, Lululemon
Best versatile gym bottle, 9/10
We like: it can be used both for the gym and the office
We don’t like: the large branding
- Available in 710ml, 946ml and 1.8l
- Leak-proof
- Lid only is dishwasher safe
- BPA free stainless steel, plastic lid and silicone band
I love this sports bottle from Lululemon, which has a twisty cap that flips open to reveal a small chug hole - it’s the perfect size for fitting your mouth without leaving room for spillage. The loop handle also makes it easy to carry around the gym and it’s sturdy enough that it doesn’t flip back and bonk your nose as you drink.
Unlike other sports bottles, it’s also beautifully designed. The powdered coating means it doesn’t slip, even with sweaty hands, and the ridged edging on the lid makes the cap easy to twist off. The rather large branding down the side is a turn off for me, though at least it’s subtle in colour. That said, Lululemon is a prestigious fitness brand which I imagine many would be proud to show off.
I do think £38 is a little expensive for a water bottle, but for that you’ve got one that’s excellently built, has all the features you need in a gym water bottle and also looks good enough to take to the office.
£38
Price at
Lululemon
7. Owala FreeSip Water Bottle
Best designed water bottle
We like: you can choose to either sip or chug
We don’t like: the lid is a little awkward to clean
- Available in 700ml
- Leak-proof
- Lid only is dishwasher safe
- BPA free stainless steel and plastic lid
Undisputedly the best thing about Owala water bottles is that you can drink from the spout like it a straw, or tilt it towards you to chug through the hole. Even better, unlike usual straws where you have to purse your lips into a tiny circle to drink, the opening is wide enough that you can drink almost naturally - no danger of wrinkles here.
Opening the lid is a case of flipping back the carry loop (bonus points) and pressing the button to release the lid. The shape of the bottle is slim, and ergonomic dents and the powdered surface make it easy to hold.
I tried the 700ml option linked above, which is slightly too big for travel, but perfect for keeping on my desk. It may sound lazy, but I love the ease of having the water bottle stationed next to my laptop, easily grabbable for a quick swig without having to tip it upside down.
The lid is a little awkward to wash, requiring a bottle brush to really get into the crevices and the silicone tab needs removing, but on the plus it’s also dishwasher-safe. Note that the body of the water bottle is not. It’s available in a fun range of colours so it’s not one for minimalists, but with water bottles becoming the newest fashion accessory, perhaps that’s what you want.
£33.60
Price at
Amazon
8. Waterdrop Thermo Steel water bottle
£26.90 for 600ml bottle, Waterdrop
Best water bottle for people who don’t like drinking water
We like: it makes drinking water more exciting
We don’t like: stocking up on Microdrink cubes could get expensive
- Available in 400ml, 600ml, 1l
- Leak-proof
- Not dishwasher safe
- BPA free double-walled stainless steel with a bamboo lid
- Claims to keep drinks cold for 24 hours, hot for 12
Waterdrop is fast joining the top names in the booming water bottle industry, with ambassadors including tennis stars Novak Djokovic and Taylor Fritz (Djokovic having reportedly made a fairly sizeable investment in the company). In such a saturated market, Waterdrop has come up with something slightly different to stand out: Microdrink cubes.
They’re essentially tiny granulate cubes made from natural plant and fruit extracts which are low in calories and free from sugar, artificial flavours and sweeteners. The bottles are made with a perfectly sized drinking hole to drop these cubes inside and flavour the water – hence the name, Waterdrop.
Flavours include ice tea lemon, made with real tea and Boost, made up of blackcurrant, elderberry and açaí. The cubes cost £6.99 for a pack of 12.
The water bottles are attractive and well made from double-walled stainless steel with a bamboo lid. You can choose from a number of pastel colours. I’d highly recommend Waterdrop to anyone who needs a bit of flavour to encourage them to drink more water.
£26.90
Price at
Waterdrop
9. Chilly’s Flip Lid Water Bottle
£42 for 500ml bottle, Chilly’s
Best hygienic water bottle
We like: the chunky, sturdy build and comfortable drinking straw
We don’t like: the large logo and the fact it’s not leak-proof
- Available in 500ml or 1l
- Spill-resistant
- Not dishwasher safe
- BPA free stainless steel with powder coated body, silicone base and plastic lid
- Claims to keep drinks cold for 24 hours, hot for 12
In a departure from the traditional Chilly’s style, this brand new water bottle has a stainless steel straw with a sporty flip lid and carry loop, designed for use on the go. It comes in either 500ml or a litre.
It’s quite chunky in appearance with a thick lid from which you drink. Unlike other straw lids I’ve tried, it doesn’t seem designed to put your whole mouth around, rather your top lip just behind the opening. It takes a little getting used to but it’s very comfortable once you have. The large drinking hole in the straw means you’re also not restricted.
I’m often a little wary of water bottles with straws because I’ve previously found they become rather unhygienic. This water bottle uses antimicrobial drinking surfaces and a stainless steel telescopic straw, which comes with its own cleaning brush. It’s just as well, since it can’t go in the dishwasher.
Unfortunately, during a commute home where I took a tube followed by the train, it did dampen the bottom of my rucksack. It doesn’t claim to be leak-proof but I do think that should be expected these days, especially for a water bottle designed to be used on the go.
As long as you’re fine to carry the Chilly’s Flip bottle by the loop, or have a rucksack with a side pocket, this is an otherwise great water bottle both for the office and working out.
£42
Price at
Chilly's
10. Contigo Autoseal Water Bottle
£24.95 for 720ml bottle, Amazon
Best stainless steel water bottle, 8/10
We like: the seal is the most leak-proof design I’ve seen
We don’t like: it takes some force to operate
- Available in 720ml
- Leak-proof
- Lid only is dishwasher safe
- BPA free stainless steel with plastic lid
- Claims to keep drinks cool for up to 28 hours
It’s hard to make a water bottle stand out from the crowd in such a saturated market, but Contigo’s Autoseal technology is the best leak-proof design I’ve seen. It works by pressing a button at the back of the lid which opens the small drinking valve. The trigger action means it snaps shut as soon as you take your finger off the back of the lid.
Of course, the downside to this design is that you have to hold the bottle by the lid in order to reach the button, which is a little uncomfortable when the bottle is full and heavy with water. However, if you’re anything like me and have a constant fear of your drink spilling in your bag (been there too many times), there’s not a chance of anything leaking here, even with the flip cap open.
The body curves inwards around three quarters of the way up so you can wrap the rest of the hand around the body as you press the lid. I’d suggest it really needs to be a little higher, though I do have small hands.
For the clever autoseal technology and excellent insulation all for less than £20, I think this bottle has the best value for money on this list.
£24.95
Price at
Amazon
11. S’wheat Bottle
Best sustainable water bottle, 8/10
We like: it’s made entirely from plant-based materials
We don’t like: it’s not as effective at insulating as stainless steel
- Available in 550ml
- Leak-proof
- Body and lid dishwasher safe, carabiner clip is not
- BPA free wheat straw and bamboo
If you’re buying a reusable water bottle with the intention of becoming more environmentally friendly, it doesn’t get more sustainable than the S’wheat bottle. The S’wheat is a reusable plant-based water bottle made from wheat straw and bamboo. The wheat straw is the stalk part of cereal plants which remains after they’ve been harvested. Usually, wheat straw would be used as biofuel, animal feed or burnt in the open - causing pollutant emissions.
In this case, it’s been pulped into a BPA free material hard enough to support a water bottle without passing on any tinny taste to the water. S’wheat also promises to plant a tree with every purchase.
Looks wise, the S’wheat bottle is pretty but simplistic. It comes in blue, green, oatmeal or black - I chose the light blue colour. The screw cap has a leak-proof lock mechanism on top which can be slid open to drink. The opening is pretty small, so this bottle won’t suit anyone who likes to chug their water and probably isn’t best for cardio workouts.
The other slight downside to the bottle is that although the plant-based material is temperature resistant and has some form of insulation, it’s not as effective as the double walled insulation in the other stainless steel bottles. If you can cope with water not staying quite as cold, then buying this bottle is an investment in the planet.
£30
Price at
S'wheat
12. Black + Blum Eau Good Filter Water Bottle
Best filtered water bottle
We like: the guarantee of clean, naturally filtered water
We don’t like: the charcoal stick doesn’t stay in its allotted space and it takes eight hours to completely filter
- Available in 800ml
- Spill-resistant
- Body is dishwasher safe
- Plastic with a cork and silicone stopper
Tap water varies from place to place. You might want to turn to this handy water bottle if you’ve got any travelling planned, since it naturally filters water using charcoal sticks. I wouldn’t recommend it for countries where drinking tap water is advised against, but it’ll certainly help make water taste better.
The natural filter system works via a traditional Japanese Binchotan Charcoal filter stick which is supposed to sit in a dip inside the bottle, locked into place, although it’s impossible to actually place it when you can’t get your hands inside the bottle. This unfortunately means the charcoal floats around and hits your mouth everytime you drink.
Binchotan Charcoal (also used in high-end barbecuing) not only filters out impurities like chemicals and metals but also imparts healthy minerals like potassium. Tangibly, this means tap water is eradicated of bad smells and tastes like bottled water. It takes around eight hours to do so, meaning you’ll get the best results filling it the night before.
This bottle is made of plastic with a cork stopper, so it’s not insulated. But I like the natural approach to filtering and I do love the clean water it provides.
£19.99
Price at
Amazon
13. Yeti Rambler
Best insulated water bottle, 8/10
We like: it’s sturdy, top quality and you know it’ll last your whole life
We don’t like: it’s noticeably heavier than every other bottle on this list
- Available in 532ml, 760ml, 1.07l, 1.4l, 1.9l
- Leak-proof
- Dishwasher safe
- BPA free wheat straw and bamboo
- Claims to keep drinks cold for 16 hours, hot for 10
I adore the Yeti Rambler, but I couldn’t put it higher on this list because it’s so heavy. The lightest 532 ml version weighs 462g empty. For context, the S’wheat weighs almost half that, at 250g, and Chilly’s Series 2 bottles weigh 390g. Half a kilo may still not sound very heavy, but it sure will take its toll on weaker wrists.
Now I’ve got the negatives out of the way, I can talk about why I love the bottle. I have it in taupe, shown above. The powdered body is top and tailed by stainless steel bands with a small logo at the bottom. The lid has a large handle which can be grabbed with a whole fist and under that is what they call their ‘Chug Cap’. It’s a shatter-resistant plastic lid with a large chug opening in the middle for gulping water on the go.
Of all the bottles I tried, the Yeti Rambler had the best insulation which is why I’ve made it the best for hot water. The Chug Cap easily screws off which is ideal for drinking tea and coffee. Unfortunately the lid doesn’t screw directly onto the body - you need the Chug Cap between.
If you want to feel like an adventurer, chugging from a rugged thermos as you explore the wilderness of your local dog park, the Yeti Rambler is the one. Just be aware that it’ll weigh you down.
£40
Price at
Yeti
14. Air Up
From £24.99 for 650ml bottle, Air Up
Best internet viral water bottle, 7/10
We like: the smell effect really does work
We don’t like: it’s not the best looking
- Available in 480ml, 650ml and 850ml
- Leak-proof
- Not dishwasher safe
- BPA free Tritan plastic
In a world where most water bottles are fighting to be the best looking, the Air Up doesn’t even compete. It does something else completely - it uses fragrance pods around the mouthpiece to trick your brain into thinking the water you are drinking actually tastes like what you are smelling.
That’s why it’s shot to fame online and is now the bane of every parent’s lives, as kids beg to have one to fit in at school. A few years ago school children were desperate for a Chilly’s bottle, now it’s this new age of pod water bottles (which cost more than most stainless steel bottles). Why? Because Air Up conducted a very clever marketing campaign when it launched, using influencer partnerships on Tiktok and Instagram to target that younger age group.
That’s not to say it’s only for that generation. The Air Up bottle is really for anyone who doesn’t like water or would drink more if it tasted like squash. I was pretty sceptical, given the aforementioned marketing campaign but I was shocked by how well it worked. You fit your chosen pod around the mouth hole, pull it up to activate the smell, and sip away.
I found the sweeter flavours like watermelon and mango a little artificial but the citruses and the cucumber were delicious. I’m not quite a convert from a traditional water bottle, but I do think the Air Up is pretty revolutionary.
£24.99
Price at
Air Up
15. Stanley Quencher
Best water bottle for reaching hydration goals
We like: it fits in a car drinks holder, despite its capacity
We don’t like: it’s impractical to carry around
- Available in 414ml, 591ml, 887ml and 1.14l
- Not leak-proof
- Dishwasher safe
- BPA free stainless steel with a reusable plastic straw
Forget a yacht on the med or a Rimowa suitcase, these oversized tumblers are the status symbol of the 2020s, flying high on the back of the wellness trend which outlived the pandemic. The Stanley Cups, as they are known to fans, come in three sizes but it’s the huge 1.2l (known in America as the 40-ounce) which has caused the buzz.
The tumblers have a large handle, a three-way lid with a straw opening, a mouth opening or a full cover. They’re designed so that the narrower bottom end fits in a car drinks holder. I tested this on a long car trip and it’s true, it is good to be able to grab the cup and sip without undoing a fiddly lid or having to tilt my head and take my eyes off the road. It’s also comfortable to drink from, thanks to the wide straw and handle.
That said, I couldn’t quite bring myself to take the tumbler out of the car. Predictably, the drawback to the bottle having such a gigantic water capacity is that it looks ridiculous to carry round in public. It’s also too large to throw in a bag, plus it leaks (from experience).
Shoppers rush to buy a limited edition pink Stanley Quencher
@victoria_robino_26 #fyp #fypシ゚viral #target #targetfinds #stanleycup #stanley #stanleytarget #valentinesday #stanleyvalentinesday ♬ original sound - Victoria Robino
The eco credentials seem impressive at first glance: it’s made of 90 per cent recycled stainless steel and comes in completely recyclable packaging. But the constant new colourways can only encourage over-consumption, particularly among the easily-influenced Tiktok crowd, where the hashtag #StanleyCup has 7.2 billion views.
While I can see why people love this bottle - I definitely drank more water while testing it - I can’t see myself lugging it around daily. It’s just too cumbersome. I’ll keep it on my bedside table and stick to my Chillys when I’m out and about.
£45
Price at
John Lewis
Water bottles FAQ
What is the most environmentally friendly reusable water bottle?
S’wheat is the most environmentally friendly reusable water bottle, because it is made from biodegradable plant-based materials, bamboo and wheat straw, which would otherwise have been agricultural waste. The company also plants a tree with every sale, takes plastic out of the oceans and donates a percentage of its profit to protect sea life.
Stainless steel is a reasonable option for a sustainable water bottle as it’s 100 per cent recyclable. Plastic uses oil and water in the production and releases carbon dioxide, a greenhouse gas, but can be more environmentally friendly if it is recycled.
“You also need to look at the packaging and shipping of your bottle. It is much more environmentally friendly to buy a locally sourced bottle in a recyclable packaging than it is to order a bottle wrapped in unrecyclable, plastic packaging,” says Natalie Byrne from Go Outdoors.
How do you clean a water bottle?
“Warm soapy water and a bottle brush will clean all sorts of water bottles including metal, glass and plastic. I recommend that you use fragrance-free soap, as bottles made of silicone and plastic can take on the scent of the soap. For straws, use a pipe cleaner. If a straw is removable, soak the straw at least once a week,” says Byrne.
Some water bottles are dishwasher safe but it is still important to clean the smaller parts with a toothbrush or bottle brush, especially those with built-in straws. If not washed properly, bacteria like E. Coli can grow inside water bottles and lead to gastroenteritis. Mould can also start forming in unwashed bottles.
How long can you keep water in a reusable water bottle?
Most companies say they can keep water cold for 24 hours and hot for 12. We wouldn’t recommend keeping water in your bottles any longer than that as it can start to take on a stale taste. That said, you can safely store tap water for up to six months, according to Healthline.
Which are the safest water bottles to buy?
Any BPA free water bottle, like all the ones above, are safe. Exposure to the industrial chemical BPA is believed to cause health problems, as I have explained in more detail in the introduction, but thankfully manufacturers are extremely cautious to avoid it these days. Glass and stainless steel are both naturally BPA free. If you’re particularly safety-conscious with your water, consider buying a filtered water bottle.
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