Small Size but 20 oz- The size of cups before folding is 4.17*6.45 inches and after folding is 2.63*3.89 inches. The silicone material of EASYXQ collapsible travel cup is light and strong. When you are outdoor camping, hiking or travelling, the small Collapsible cup is good choice. Safe Material Food Grade Silicone- Our collapsible travel cup made of food grades silicone, No BPA. It added a anti-scald ring for safety. Besides. It is easy to clean, non-toxic, odorless, non-staining, durable, flexible & reusable, withstands temperature of -104℉ ~ 428℉. Safe and healthy for the whole family. It`s safer and larger than similar products in the market. Awesome Design- The hiking hook is easy to be hung on the bag of a connective hand rope and portable hook. space saving and only 2.63 inches when collapsed, takes up no space, ideal for outdoor hiking, camping, travel, and sport events. Also perfect using in office as coffee cup. Sturdy Base and Drink Easy- With the sturdy base the coffee cup is not easy to tip over. This reusable mug can drink directly or insert a straw according your preference. Using Tips- First, please make sure the lid and hole are totally sealed after the cup is full of drinks. Second, 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. Egoldto Collapsible Travel Coffee Cup, foldable camping and hiking cup with hook and lid.