Some people use an old Antoids can or make them out of an old tin can. Vendors sell blade banks very inexpensive if you are already placing and order.
Also some blade dispensers have a used blade slot in the back. Do a search for blade banks and see if anything interests you. I think wrapping in paper and putting in the trash is not very safe.
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All right, they're on our left, they're on our right, they're in front of us, they're behind us... they can't get away this time. [When Surrounded By 8 Enemy Divisions During WW2]