FLYZOE Collapsible Sports Water Bottles Leak Proof Portable Water Bottles for Hiking Camping Cycling Made of eco-friendly high food grade silicone which means that you can use it for hot or cold beverages; Lightweight, collapsible and flexible. Capacity of 17oz water, and it is foldable without leaving any crease, takes very little space when empty; The leak-proof design with air tight cap prevents spilling. Easy to fill with water or ice cubes with wide mouth and hold up well with no leaks; It is tough and durable that able to different temperatures without deformation, virtually unbreakable; Ideal for skiing, running, hiking, biking, boating, etc. Available for all sports, outdoors and everyday activities. It is the best choice for health conscious adventurers.