It turns out that reinventing the wheel doesn't always work. So I yanked some hooks that work great from @PeterBr0 and slapped them on my design.

As with the original, open the soda cans with a can opener and put whatever you want inside.

Best printed on the side (so the hooks are made of continuous layers) with organic/tree supports.

2025.6 UPDATE: Added a version with a retaining hooky bit at the bottom, to prevent the can from falling through. I really ought to re-model the whole thing from scratch.