It is simply ideal to carry your water, your drinks, your energy gel when you go out on Trail or Running and not to have to take out your flasks during your effort. Practical and comfortable, its ergonomics fits perfectly to your hand. Its rectangular shape has been designed to fit easily into any backpack pocket. Its drinking teat, Valve Blaster™ is very comfortable, offering a high flow rate and anti-leakage guarantee. Its large opening will allow you to fill and clean your flexible flask very easily. Its Polyurethane material will allow you to turn it over completely to maintain it and offer you maximum hygiene. This flexible Flask does not contain PVC, bisphenol A or phthalates.