This sports water bottle is made of food-grade silicone, non toxic, odorless. Provide you with a practical and safe drink bottle, you can use every day. The unique design allows it to be collapsible from 9.8 inches to 5.5 inches to save 50% of the space. Convenient to carry,c an be folded down to one-third of the size after drinking water,saving a lot of space. They are more resistant to falling than ordinary water cups, and will not cause damage to the cup due to bumps or falling of the water cup during exercise.