Insulation ring for a hot cup

This is an insulation ring for a cup. I printed the first version in PLA (I KNOW IT WILL NOT LAST), next will be done in flex material. The design is customizable in Fusion 360 (both diameters, height, thickness). The STL is made for Aral soccer World Cup cups, diameter is 73mm and 81mm, height is 40mm, thickness is 3mm.

Use the parameter function in Fusion 360 in order to customize.