Egg cup & stand. Egg cups are handy, but the stack can fall over quite easily in the kitchen cabinet, which can be quite disruptive with what you're doing.
So, why not stack 'em on a pin? :-)
Added the STEP source files, so you can modify as required.
egg_cup.step | 127.8KB | |
egg_cup.stl | 561.0KB | |
egg_cup_stand.step | 24.0KB | |
egg_cup_stand.stl | 257.3KB |