This cup sleeve fits around the disposable coffee/tea cups that you get at coffee shops. The sleeve creates a pocket of air between your fingers and the hot cup.When printing this sleeve make sure you check the box next to "Only follow mesh surface" in Cura's "Expert Settings" panel. This will print the outside surface of the model with no top, bottom, or infill. To open the "Expert Settings" panel press Command - E or click on "Expert" in the top menu bar and then "Open expert settings..." This sleeve was made to fit 12 ounce cups from The Coffee Hound and Fusion Brew in Bloomington/Normal, Illinois. I've included the Blender file for you to download if the cups from your local coffee shop are different dimensions or if you would like to modify it to fit a medium or large cup.