[Product Information]- The size of cups before folding is 2.16*2.16*3.18 inches and after folding is 2.16*6.29.3.18 inches. The silicone material of DARUNAXY collapsible travel cup is light and strong. If you want to travel simply and conveniently. it's your best choice. [Tips]- First. the cup is not completely adiabatic. so we do not recommend filling it with very hot liquids to avoid scalding. When filling hot liquids. please hold the heat insulation ring in the middle of the cup. Second. please make sure the lid and hole are totally sealed after the cup is full of drinks. Last but not least. don't put the cup in your backPack when the cup is full of drinks. because vigorous shaking may lead to loosening of the plug. [Safe Material & New Upgrade Version]- We increase one more collapsible layer to enlarge the capacity. Our collapsible travel cup made of food grades silicone. plastic lid. It is easy to clean. non-toxic. odorless. non-staining. durable. flexible & reusable. safer and larger than similar products in the market. [Perfect Seal]- The leak-proof design allows you to seal tight the cup; The sip hole helps you easily have your drink through it. without opening the entire cup. and has a silicone cover that shuts the cup when not in use. keeping any outside elements or even small bugs from getting inside your cup. [Awesome Design]- Our 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. space saving and only 2.16 inches when collapsed. fits 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.