I simply added a text warning to mrbug's v2 design so people/guests/roommates know to be careful with the disposal box.

I only put text on the front so it would still be stackable.

There is a large text and small text version, depending on how much of a warning you want to give. I prefer the larger text one.

Shoot me a message if you want the .blend files (if anyone wants to try for dualstrution or something).