Ski Pylon Cupholder

I started with the cupholder from Pelphry17 and customized it to fit the ski pylon on my father-in-law's old MasterCraft Prostar 190. The boat has cupholders, but they are too small to fit a large tumble like a Yeti.

I haven't printed it yet so I can't say for sure that it fits, but I'm pretty confident in my measurements. I would like to find a more sophisticated way to attach it to the pylon. I plan to use two stainless steel hose clamps. Feel free to offer suggestions or remix it.

This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/lUqqkeTUMdQ