This toothbrush container has 2 main features: It can be closed using tower top, so safe to leave in your holiday home while you are away while providing enough ventilation. It has holes in the bottom to drain drops of water and collect it in small water tray under the basement (or don't use a tray if you keep it on a sink).
This also can be used as a pencil cup, just remove top platform and build number of layers you need.
Even without glue parts should connect and hold ok, but depends on the printer. Still I have put a bit of glue when I was happy with result.

for toothbrushes I have used
4 Tower3cmLayer.
1 TowerBase
1 TowerBase
1 WaterTray
1 TowerTopPlatform