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

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.

nice bottle to use anywhere you go easy to transport without it spilling easy to clean and easy to use

The product functions effectively and meets its intended purpose quite well. However, one significant drawback is the rubber seal, which unfortunately does not perform as expected. This flaw allows water to leak through the seal, which can be problematic and may impact the overall usability of the product. It would be greatly improved if the seal were upgraded to prevent this issue.r seal, which unfortunately does not perform as expected. This flaw allows water to leak through the seal, which can be problematic and may impact the overall usability of the product. It would be greatly improved if the seal were upgraded to prevent this issue.

It does what it's supposed to do, the tip is a bit stiff in the beginning but just pull and push a few times and it loosens up, nice looking and light

These seem to last longer than other brands I've used.

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.

Good size. It’s ok. Doesn’t leak when stood upright. But the nozzle isn’t easily cleaned properly. Not a long-term purchase. Over time, the water becomes tainted easily no matter how the bottle is washed, even with bicarbonate and vinegar. Eventually, the water becomes evil tasting every day. The only solution is to throw the bottle away buy another. The water becomes tainted ones contaminated and the taste is bad daily.

🧴 Science in Sport SIS Clear Sports Water Bottle – 800ml, Transparent For a bottle that costs less than a fancy coffee, this SIS 800ml delivers excellent value for money. It’s lightweight, durable, and designed with athletes in mind—but it’s just as handy for everyday hydration, whether you’re at the gym, on the bike, or chasing toddlers around the park. 💧 Leak-proof confidence The standout feature? That push-close top. Unlike twist caps or flip lids that can wear out or loosen over time, this valve-style closure stays snug and secure. No drips in your gym bag, no mystery puddles in the car cupholder. It’s a small detail that makes a big difference—especially if you’ve been burned by leaky bottles before. 📏 Practical design Clear body for easy mixing Fits standard bottle cages and backpack pockets Dishwasher safe for hassle-free cleaning BPA-free plastic with a sturdy feel—not flimsy or brittle 💰 Verdict: At around £3.75, it’s a no-brainer. You’re getting a reliable, well-designed bottle that punches above its price tag. And with the push-top staying leak-free long after cheaper alternatives give up, it’s a smart pick for anyone who values function over fuss.

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

Coppia di borracce perfette per il triathlon, integrabili nei più comuni portaborraccia.