The Folding Water Flask with soft bite mouthpiece and ON/OFF valve,compact for your backpack during outdoor activities.Suitable forriding,running,cycling,hiking and mountaineering etc. 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. Specification: Material: TPU,TPE Capacity: 500 ml / 17 floz Size: 26 * 9 cm / 10.2 * 3.5 in Weight: Approx. 36.7 g / 12.9 oz Package weight: Approx. 38.9 g / 13.7 oz Package List: 1* Soft Water Bottle