BEACH ASHTRAY (easy print)
"Help Keep The Beach Clean, Please Take Your Trash With You"
A few years ago some brands made ads with objects similar to this, they were very useful to keep the beach clean.
part list:
Magnets 3x18mm (chinese) + epoxy glue (some tolerance)
added 2 files for development where you can invent a lock system to avoid magnets:
beach-ashtray-dev.stl
beach-ashtray-cover-dev.stl
enjoy ;)