I thought this would interesting - Our Old House Sharing

both the medicine cabinets in my house had the slots But the upstairs bathroom which was for the kids had no razor blades in the wall

In the old days, there was a slot in the medicine cabinet to drop the used razors behind the wall Mine still has it and I am sure there are

old medicine cabinet with razor blade slot The video above shows the finding of razor blades inside a medicine cabinet If you notice one of these small slots in your bathroom cabinet

old fellow slot razor disposal slot built into a bathroom medicine cabinet? Was If you find old Gillette razor blades, the coating on the blades