Onoff valve with doubleseal clip Secure, biteactivated drinking: the bite nozzle lets you control water flow simply by biting, so you can hydrate without stopping. Reliable leak protection: the on/off valve plus a portable doubleseal clip ensures a tight seal when closed, preventing spills during transport. Wide mouth for fast filling and cleaning Large opening gives easy access for hand washing or using a brush. Easy to add water, ice cubes, or sports drinks without spills or extra tools. Hygienic and simple to use Dust cap keeps the nozzle clean when not in use; remove the cap and open the on/off valve to drink. Designed for quick, intuitive operation so you can hydrate with a gentle bite on the nozzle. Compatibility, sizes and practical performance Available in 1.5L, 2L and 3L capacities to match different trip lengths and hydration needs. Designed to be compatible with most backpacks for convenient storage and hands access. Practical use scenarios Day hikes: carry enough water with easy refills and quick sips while on the trail. Short walks or urban outings: slip the bladder into a backpack or pack and stay hydrated without stopping. Climbing or technical routes: rely on the secure seal and bite valve for onthego hydration without spills. What this solves Prevents leaks and accidental openings during movement. Makes cleaning and adding ice or drinks fast and straightforward. Keeps the drinking nozzle clean and easy to operate so you can hydrate reliably while active.