Features: Made of food-grade silicone material, odor-less and non-toxic, safe for use. Folding and retractable design makes it easy to store and carry. 580ml large capacity, sealed and leak-proof design, which can effectively prevent the water let out. Wide mouth design, the bottle allows easy filling and cleaning. Designed with aluminium alloy hook for convenient hanging and carrying. Very portable, easy to carry, great for outdoor use, travel, camping, sports, picnic, etc.