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.

But the brand’s popularity isn’t all down to its fun designs; S’well bottles are everything you could want in a water bottle. They’re BPA-free, made from long-lasting stainless steel and keep water cool for up to 24 hours thanks to a clever vacuum design. They also keep liquids hot for up to 12 hours so they can be used as both a water bottle and a travel mug. A S’well bottle is far from cheap but is well worth the money if you’re able to splash out, especially if an attractive bottle is likely to make you sip from it more frequently.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? Hydro Flask’s Parks For All giving programme supports non-profit organisations focused on the building, restoring, and investing in public green spaces so people everywhere can live healthier, happier and more fulfilled lives.

Jenna Bilbrey, BPA-Free Plastic Containers May Be Just as Hazardous, Scientific American, August 11, 2014 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. Some research shows that hydrogen water may be effective at reducing markers of oxidative stress and improving risk factors related to metabolic syndrome.

A study in ten male soccer players found that athletes who drank 51 ounces (1,500 ml) of hydrogen-enriched water experienced lower levels of blood lactate and decreased muscle fatigue after exercise compared to a placebo group ( 9). 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. The product may benefit athletes by reducing inflammation and slowing the accumulation of lactate in the blood, which is a sign of muscle fatigue ( 8).