This collapsible water bottle is made of food-grade silicone + PP material, BPA-free.Measures 9.45 " x 3.22 " x 1.88 " in size,this flexible water bottle can reserve 600ml liquid with only 135g in weight.Equipped with folding belt,it can be folded from 10 inch to 2 inch in height,which can tie the cup to 20% of the original size, difold bottle fits in your purse,backpack or suitcase,greatly saving space and convenient to carry.It has excellent heat resistance and can withstand temperatures from -50 to 200 degree. It has leak-proof and impact-resistant properties and is very suitable for all activities and sports. Even if it is squeezed or pushed,it will be tightly sealed.Even if you put it in a backpack or computer bag, it will not leak.Great gift choice.Custom with your logo today!