Seasucker Classic Ski Rack Suction Cup Covers
I printed with PETG 2-3 walls 0.6 nozzle at 0.2 layer height
You can sink the model down so that the bottom layer is only 5 layers (1mm) if you want it to be a bit more flexible. The way it currently is, is a bit stiffer.
The author remixed this model.
Changed the diameter, height, flattened the center
Fits the classic ski rack