Single-Sided, Poly Hot Cups Are Perfect For Serving Hot Beverages Like Coffee, Tea Or Cocoa. The Cups Are Lined With Polyethylene That Acts As A Moisture Barrier To Keep Liquid Inside The Cup And Prevents Leaking. Smooth Rolled Rim Gives Rigidity To The Cup And Ensures A Leak-Resistant Lid Fit. Cup Is Designed For Solo Liftback And Lock Tab And Traveler Dome Hot Cup Lids (Sold Separately).