1.?? Safety Material??��o Our collapsible water bottles are made of Food-Grade TPU material. BPA and PVC free.the soft water bottle is tasteless and eco-friendly and safe. durable lightweight with good toughness. 2.??Capacity??��oThe running water bottle is 500ml. 3.??SPACE SAVING??��oOur collapsible water bottles is light .The running flask can be folded in the min volume while empty, no burden for running, Hiking, Cycling, Climbing. 4.??EASY DRINK??- Light squeeze gives ample hydration, collapsible water bottle for running, Hiking, Cycling, Climbing etc. the water bottle is easy to folded and carry. It can fit easily in pack pockets. Great soft hydration flask for men, women and kids. 5.??Tips??- The soft flask is recommended for temperature 0-40 ??.