Specification: Item Type: Coffee Cups Sleeves Weight: 213g/7.5oz Material: Paper Package List:50 x Coffee Cups Sleeves Features Durable Material:: The paper cup lid is made of high-grade heat-insulating paper material, which has good heat-insulating properties and can effectively protect the user's hands from being burned. Adjustable Design:: This coffee cup sleeve adopts a jack design, which can adjust the diameter of the sleeve according to the size of the cup, adapting to paper cups of different sizes, making it convenient for users to use. Efficient Thermal Insulation:: The corrugated structure of the beverage cup cover provides additional heat insulation, effectively blocking heat transfer, keeping the coffee warm and allowing users to enjoy the taste of hot coffee. Easy to Use:: Users can easily put the milk tea cup sleeve on the coffee cup and discard it directly after use, avoiding the trouble of washing and cleaning. Pollution-free:: Paper cup sleeves are made of degradable materials, which are environmentally friendly and will not cause pollution.