Features: Made of premium food grade TPU and TPE material,safe and taste free. Soft bite mouthpiece into your mouth and easily drink water flow per sip. A dust cover helps to keep the mouth piece of the water reservoir clean. The bite mouthpiece has ON/OFF valve,simply pull valve up for drinking and push it for closing. Leakproof sealing edge makes sure the pressure tolerant and leak proof features. Large opening mouth makes filling/refilling water quickly and cleaning easily for every corner. Optimum Temperature is from -20℃ to 70℃,portable to store hot/cold water during outdoors activities. A mounting holes can be hanged or attached easily for you different demands. Shrinks in the min volume while empty, take a little space and easy to store. Suitable for riding,running,cycling,camping,hiking,mountaineering,outing or excursions etc.