Single cupholder for Bugaboo stroller or similar. I couldn't find a cupholder that grasps/clamps the cup, so I made my own design and added the bugaboo connector.
The connector is from:
https://www.thingiverse.com/thing:2688454
Should be printed upside down. The bottom (printed last) did not succeed without supports, too much to bridge. Instead of working on it, I just printed the bottom separately and glued them together.
The author hasn't provided the model origin yet.