Made of high quality silicone, with good durability and elasticity, no odour, providing you with a soft bite, allowing you to sip easily and drink healthy water Replacement sleeve for bite valve, 0° or 360° to close the water valve, 90° to open the water valve, tilting design makes you more comfortable to drink. With a silicone nozzle on the tap, you can drink from the bladder by simply applying pressure with your lips or teeth, completely freeing your hands. You don't have to worry about water leakage even after release. Fits most bites, works with most brands of bladders and different capacity reservoirs; Compatible with Packs Hydraulics reservoirs. Whether you are cycling, travelling, running a marathon or having other outdoor adventures, it is the perfect replacement for your water bag.