Safety Promise: Made of food-grade TPU and silicone material, 100% BPA & PVC Free, the soft water bottle is tasteless and eco-friendly Practical Design: Light squeeze gives ample hydration, high-flow bite valve auto-seals after each sip, without leaking. Convenient collapsible water bottle for daily, travel or outdoor sports Foldable and Portable: The soft water flask is compact and built for a long life for durable use. The running flask stands upright when it full and shrinks in the min volume while empty, no burden for sports Practical: The folding water bottle with straw/nozzle can be frozen and chilled overnight, easily get a refreshing beverage on the hot day. ( Recommended used temperature: 0 - 40 ℃ ) Multi-Use: Ultra-light hand water bottle is easy to fold and carry. It can fit easily in most hydration vest, belt or pack pockets. Perfect for running, cycling, hiking, mountaineering, and more