Intimate Leak-Proof Design: The folding water cup with a silicone sealing can largely prevent unnecessary leakage and ensure an airtight seal when the bottle mouth is sealed. Safe Food Grade Silicone Material: Our collapsible travel mug is made of food-grade silicone We've also added an anti-scald for added safety when using the travel mug. Furthermore, it is easy to clean, odorless, durable, flexible, and reusable, and most importantly, it can withstand temperatures from -50C to 200C. Portable And Lightweight:Updated collapsible design, space-saving and only 4.2 in when collapsed, fits well in your pocket, purse, backpack, suitcase and takes up no space, ideal for outdoor hiking, camping, travel, and sport events Optimal size: silicone foldable cup capacity is 500 ml, before folding, and the height is 9.5 cm. After folding, the height is only 4.2cm. The capacity of the mug is too large to carry around. The capacity is too low, the reuse is tedious, 320 ml is the best usable capacity, suitable for coffee, milk, cola, juice, hot water, etc. Do Not Put In A Backpack: First, after the cup is filled with beverages, enable the lid and hole to be completely sealed. Second, don't put the cup in your pocket when it's full, as vigorous shaking may cause the stopper to loosen. With Lid: The tight and snugly fitting lids can prevent any dust and dist from the air. Connective Hand Rope: A combination of both can string the cup and dust cover together Space Saving: With the collapsible design, never take up your space. Stainless Steel Cup Rim: The stainless steel rim at the top is strong and maintains the integrity of the collapsible cup Color: green Expanded size: 16.4*10.2cm Folded size: 4.2*10.2cm Three heights of water cups: 4.1/11.1/16.8cm Capacity: 500ml Material: food-grade silicone, PP Product List: Sports folding water cup*1