Recently, my dad shipped me an old S&W 422 pistol in an early 90's Glock pistol case. I think I now know what inspired the "Tupperware" slang name for Glock pistols beside being partially made of plastic. The Glock case is a plastic box with a snap on lid about the size of a large Tupperware sandwich box. I think the original case for the 422 was a cardboard box.