Glue the top to the base, and then slowly fill it up with your used blades over time. In 30 years when the container is full, throw the whole thing away and make a new one. Don't be that guy or girl who throws razor blades into the trash.
Designed specifically to fit the larger 18mm Olfa knife blades, as well as the 60mm rotary cutter (pizza cutter knife) blades that I could not find another design capable of dealing with. It can obviously also be used to safely dispose of standard razor blades, X-Acto blades, utility knife blades, 9mm Olfa blades, etc.
Two tops are included, one without letters, and one to print a label using MMU. Any printer settings should be fine, I made these with PLA and standard settings (15% infill). No supports needed if you print the top upside down.
The author marked this model as their own original creation.