Did You Ever Hear of Razor Blade Walls?

I found about 100+ old razor blades, the very thin 2 sided kind With the Medicine cabinets of yesteryear used to have a slot in the back for the

, have slots in the medicine cabinet that are designed to take razor blades? Some homes even

razor blade slot razor blade disposal where the blades dropped between the walls to be forever forgotten Of course, that was before razors came with 26 blades

razor slot Vtg Mid Century Etched Mirror Recessed Medicine Chest Razor Blade Slot 2 Shelves Pegasus Bathroom Medicine Cabinet