COLLAPSIBLE FLASK: Only 33g (1.16oz) Soft material conforms to any pocket, and shrinks as you drink to reduce movement and pack away easily when empty EASY POUR & DRINK: With wide neck design, its convenient to pour water into the soft flask water bottle. HYDRATION VEST COMPATIBLE: Fits easily in most hydration vests, belts or pack pockets. Provides bounce-free stability and a flexible flask shoulder to prevent chafing APPLICATION: The handheld water bottle is design for outdoor sports and daily life use. This sports gel flask is perfect for hydration, marathon, jogging, running, hiking, cycling, climbing, backpacking, traveling, etc ATTENTIONS: Recommended for temperature 0-40. The hand water bottles is unsuitable for colored drinks because its not easy to clean. Our water bottle comes with tea bags to remove the odor