Cup sleeves, also known as coffee sleeves, are cylindrical sleeves that fit snugly over handle-less paper cups to insulate the drinker's hands from hot coffee. They are made of textured kraft paper materials and come with adjustable slots to fit various cup sizes. These sleeves allow coffee shops, fast-food restaurants, and other vendors to avoid double-cupping and use a single cup for hot beverages. They are strong, lightweight, and tear-resistant, providing safety from burns for both employees and customers.