Thanks to TheScienceCube for the original -- it's nearly perfect for my use, but they recommended slicing the bottom flat, losing part of the original model. I didn't want to lose any of the structure, so I simply chose to remix it, adding a base/stand.
Use supports… I only use them inside of the base ring. Outside the ring is supported enough.
Remixed from: https://www.thingiverse.com/thing:4543614
Category: Containers
The author remixed this model. Imported from Thingiverse.
Added the ring base. The original model had a rounded bottom, so couldn't sit upright.
Original designer suggested slicing off the bottom, and I'd've rather not.