I wanted a drink holder that could be used on our boat or out sitting in the yard or just sitting at home on the carpet. I designed the two pieces in TinkerCAD.
I printed mine using PLA filament.
This is the Stainless Steel cup holder that I bought from Amazon for $7. There's a little foam strip under the edge that you will remove.
(Note: I believe I fixed the link. The Amarine drink holders are sold in various quantities from Amazon. If you want to buy more than one, you may want to look for the 2 or 4 pack.)
Use supports when printing the Base. It only needs it in the very center, but will be obvious why when you look at the design.
Supports needed for the base only. No supports needed for the side cylinder.