1.Safety Material: Our soft folding water bottles are made of Food-Grade TPU material. BPA and PVC free.the soft water bottle is tasteless and eco-friendly and reusable and durable use.2.Easy Drink: Light squeeze gives ample hydration, high-flow bite valve auto-seals after each bite, without leaking. Our collapsible water bottles is ideal for marathon,running, Hiking, Cycling, Climbing,Travel,outdoor sports etc.3.Capacity Each folding water bottle is 500ml/40 grams/ 1.4oz. Size is W90mm X H 260mm/W3.54"XH10.24".4.Space Saving collapsible water bottle is Only 40g (1.4oz).The running soft flask can shrink in the min volume while empty, no burden for sports.very suitable for women,men and kids.5.Practical The folding water bottles with nozzle can be frozen and chilled overnight, easily get a refreshing beverage on the hot day. ( Recommended used temperature: 0 - 40 )