This beverage bag is waterproof~ The cup used in the picture is a Starbucks cup, please be careful not to put a fat cup! To enlarge the cup or thermos, it is recommended to buy another bag as follows: https://www.pinkoi.com/product/bHygBJ9v Cup set name: duck drink Zhen milk waterproof and environmentally friendly beverage bag set Cup material: tarpaulin Cup size: 7cm high Designer Profile: Creation [Weird Couple# is a difficult life] is a girl from Hong Kong who started a new life in Taiwan due to her fate. She also created a series of illustrations and recorded the people who liked in Baodao. And funny things, including the fish Mr. who is very important in life. When you feel that life is difficult, you will use a brush to paint the world’s quirky experiences and feelings in your heart. I hope that when you see it, you will feel empathy and smile. At present, we will try our best to swim in the major cities of Taiwan. I hope more People will see our creations. ___________________________ ***If you need to send Hong Kong/Overseas, please communicate to the designer before placing an order.