Package contents - 2 x soft flasks, each 250 ml (8 oz) Material and safety - Made from food-grade TPU (thermoplastic polyurethane) material and BPF-; lightweight, ultra-soft and durable - Suitable for water between 0 and 60 degrees Celsius - Do not place in the freezer compartment of the refrigerator Design and portability - Foldable running water bottle that is easy to carry when empty or full - Folds to a compact size for convenient packing - Easy to slip into a backpack pocket or small bag Valve and usability - Durable bite valve with a dust cover - To drink, nibble or pinch the bite valve and water flows out easily Use scenarios - Running and cardio workouts: lightweight hydration on the move without bulk - Hiking or cycling: compact profile fits in small pockets or hydration belts, quick refill between activities - Travel, gym bag, or daily commutes: collapsible storage when empty, simple to refill and reuse