This collapsible travel cup made of food grades silicone,guaranteed stainless steel rim and plastic lid,BPA Free.It is easy to clean,non-toxic,odorless,non-staining,durable,flexible and reusable.Premium quality soft silicone material make it durable and unbreakable.Collapsible water bottle will never leak or shatter if you accidentally drop it.This portable travel folding silicone cup comes with D shape hiking hook.It is easy to be hung on the bag of a connective hand rope and portable hook.Fitting well in your pocket, purse, backpack, suitcase and takes up no space, ideal for outdoor hiking, camping, travel, and sport events. Also perfect using in office as coffee cup.Welcome to inquiry.