Package included one soft flask (500ml/17oz) Material: made of food grade TPU (thermoplastic polyurethane) material and BPF-free, safe and lightweight, easy cleaning. Recommended temperature range 0-60 With a wide 20mm cap and high-flow valve, the soft flask makes staying hydrated faster and easier, when you want to drink water, just nibble the groove of the valve without taking your running backpack off or stopping your running steps When you are running or doing other outdoor activities, this water bottle is a very convenient way to carry additional water. The soft flask is really easy to drink and will not leak. The biggest advantage is that it folds easily when empty. Multifunctional Soft Flask: Soft foldable flask can be widely used in climbing, marathons, running, hiking and any other outdoor activities.