I needed a place to keep my mod while driving and to store my e-juice. This fits perfectly in my Ford Escape cupholder. The top diameter is 90mm and the bottom is 84mm. It holds a SMOK Alien 220w Mod and two 30ml ejuice bottles or smaller. I printed the liner out of TPU so it would not scratch my mod when sliding it in and out, and it fits perfectly.
Use TPU for the liner and PETG for the base to withstand the heat in a vehicle.