Despite its many uses, BPA has been found to cause several health conditions, prompting various industries to make the push towards BPA-free products. One of the great advantages of this Hydro Flask reusable water bottle is that you’re given the functionality of a thermos flask in the tiny package of a normal water bottle.

But it’s a sturdy, well-insulated bottle that – unlike the gigantic Stanley Quencher – is adaptable for just about every situation. If you’re heading somewhere you know won’t have access to fresh water, though, the LifeStraw go 650ml is essential, while the Air Up original bottle is a game-changer for anyone who can’t stand plain water. Water retention: every bottle was put through our 'bag test'; filled to the top, closed tightly shut and then shaken around in a bag before being checked for leaks. Although it doesn’t make any specific insulation claims, we find that it keeps water cool throughout a day in the office. Once you’re finished, you won’t need to lug around the cup all day but can slot it over the water bottle to save space.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. Thanks to its design, which makes it just as flat as a A5 notebook, you can carry the bottle together with your notebook and smartphone in the same hand, being able to have the other hand free. The bottles are made with a perfectly sized drinking hole to drop these cubes inside and flavour the water – hence the name, Waterdrop.

Or pack a vacuum insulated flask to keep drinks hot for 10 hours, or cold for 24, for delicious drinks while you explore the great outdoors.

Drink safely with our New PP (polypropylene) BPA free - EU Certified - stylish reusable flat water suitable for cold and hot drinks (up to 90 degree Celsius). Nike’s water bottles have long been a favourite of athletes and gym goers because of their ergonomic designs which are easy to grab and chug. The it's logic stainless steel bottle is extremely practical, lies comfortably in the hand and just looks outrageously cool. Once its pressed back again, there’s a protective cover to stop it getting dirty – a nice touch – and a tiny sliding lock to prevent the button pressing accidentally when it’s in your bag.