Science in Sport SIS Yellow Sports Water Bottle, Plastic Water Bottle, Black Logo, Yellow Colour, 800 ml [Design may vary]

Excellent and at a great price 😃. Holds enough water to last me during a 90mins training session. Hasn’t leaked in my sports bag.

This drink bottle is cheap (£5 at the time of writing and now reduced to £3.75), plastic and simple. Indeed, there is no capacity markings on the side of the bottle (800 ml) and the sports top is disappointingly rather stiff to open and close if using your fingers. Of course, using your teeth to open will in time destroy the mouthpiece, if not your teeth! I am hoping that this mouthpiece will loosen a little with use. I do like the indent two-thirds up which makes this easy to grip and from which to hold to drink. Water leaks from this if the sports cap is left up but otherwise, turn it upside down and I did not experience any leaks. Purchased for hiking in the Madeira levadas, this was tested out initially in the gym and to my satisfaction. This is certainly suitable and capacious enough for my forthcoming hiking trip. It is a no frills sports bottle suitable for my needs.

It does exactly what you need without any issues. Hydration is straightforward and consistent, with a steady flow that works well during training. Mixing is effective. Powder blends evenly with a quick shake and does not leave heavy clumps, which helps when using sports drinks. The lid design works well. It opens and closes securely and does not leak during use or when carried in a bag. It is easy to use mid-session without slowing you down. Cleaning is one of the best parts. The wide opening makes it easy to rinse and wash properly, which saves time and keeps it hygienic. The clear colour is useful. You can see how much you have left and check if it is clean. Quality feels good overall. It is not premium, but it is reliable and holds up well with regular use. The only reason it is not 5 stars is that it does not stand out beyond doing its job well, but for a simple, functional bottle, it delivers.

Water bottles ey? Who would have thought it would be such a palaver to find the right one!? But I may have found it with this one: Nice squishy plastic (but firm enough), so it’s easier to squeeze the water into your mouth! Nice soft cap that you can open with your teeth so you can keep one hand on your handlebars. Nice little design (ridge) that enables the bottle to sit in a water holder with ease. Fits my Vico Carbon Elite perfectly!! Nice wide opening, making it easier to fill - and to fit ice in for those extremely hot days out! Nice price - I.e. relatively cheap so if something does happen at least you can get another one, without breaking the bank - and at a cheaper price than a more expensive bottle. BPA free! Which is a good thing. Flow rate is pretty good. The bottle is marked to help you measure out SIS supplements if you are using. Also…sounds a little odd to say, but when you need to quench your thirst it actually TASTES like water (if you have water in your bottle obviously - if you had Lucozade in it, it would taste of that!!). Some bottles can add a plastic-y taste to the water - this one doesn’t! I use a hydration backpack as well as this on a ride, and that definitely has a distinct plastic taste to the water! So it’s nice to get the pure taste from at least 800ml (probably a little more if you fill it right to the brim). Also as it’s quite squeezable - if you’ve got anything left after a ride, you can have a decent water fight with your mates! Onto the bad points; I’ve seen from other reviews that the bottle can get discoloured if you are using a coloured fluid in your bottle - this may be the case, but it doesn’t affect the use - so far mine has stayed the same clear colour due to me just using water. Also other reviews have stated that if you drop it on its head, you will snap the nozzle - my advice is don’t drop the bottle! Although if you do have butterfingers and it does snap it’s not a hugely expensive cost to replace. Overall a pretty good bottle and a piece of kit I will always definitely carry round with me when out on the bike! I tend to use this mountain biking, and the only thing I’d suggest as an improvement is probably a nozzle cover to keep the mud and stuff out of the nozzle, but this would obviously make it a tad harder to open on the bike. Would I buy this bottle again? Maybe, although probably not as since I purchased this, SIS have released a slightly larger 1000ml bottle in the same style - and I’d probably get that instead for that little extra hydration! Thanks for reading - if you found this helpful, please let me know by clicking below. 😀

I’ve purchased three of the Science in Sport SIS Yellow bottles, and they continue to impress me every time. The bright yellow colour not only looks fantastic but also makes the bottle incredibly easy to spot, whether it’s in the gym bag or attached to my bike—no more rummaging around or losing your bottle during a busy session. One of the standout features is the waterproof and leakproof design. Thanks to the secure, lockable valve, I never have to worry about any spills in my bag or car—these bottles keep every drop where it belongs, even during hectic cycling or gym workouts. The flexible yet durable plastic copes well with drops and daily use, so it’s built to last and still feels comfortable to squeeze for a quick drink. The ergonomic shape makes it super easy to grip, and its flexibility is perfect for sports and on-the-go hydration. The bottle also features a wide neck for easy filling and cleaning, plus clear measurement markings, which save time when mixing up energy powders or electrolytes. After trying many different brands, I can honestly say these bottles are some of the best. They’re reliable, flexible, and their yellow colour makes them stand out from the crowd—a great choice for anyone who values both function and style in a sports bottle.

I bought a couple of these water bottles due to the hot weather as the old one had had enough. A very wise choice. The bottle is durable and made from good quality materials. A very important thing is that it doesn't leak (I expected a trusted seal from SIS), so I'm very glad about this. It holds an amount which is enough for me and one session for hydration. Easy to carry and fits well into rucksack pocket and bicycle holder. Looks great and can see how much liquid is remaining. I haven't noticed any difference in taste due to plastic whether with water or fizzy drinks. Great for gym, cycling, walking/running, well anything really. Very pleased thanks guys.

Ottima borraccia a un prezzo accessibile. Leggera e facile da usare anche per bambini durante lo sport. È facile da pulire e il materiale sembra resistente. Consigliata

Ürün kaliteli ,bisiklet sürerken akıtma yapmadı, gayet şık ve güzel.

It does the job. 😊

for the bicycle it gets dirty where you drink, so not ideal. But overal good quality and does not get so easy scratched

Used these for the bike leg of an Ironman race. They fit in the bottle cages well and they are easy to open with you mouth while riding. The optic yellow makes it easy to spot your bike during transition which is a nice added bonus.