This lightweight, collapsible bottle features a high-flow nozzle for quick hydration during races. It is easy to store when empty. The Big Bite valve allows for easy biting and drinking without spilling a drop. It is completely leak-proof thanks to an intelligent closure system for drip-free transport. The wide opening makes it easy to fill with water and ice, as well as for cleaning. The bottle dries easily. When empty, it can be folded down and fits into almost any bag. It is free from BPA, BPS, and BPF and is dishwasher safe. The measurement markings in oz and ml allow for precise dosing of water and electrolytes. It is completely flavor-neutral.