While I am quite sure that the glasses in question are quite a conversation piece, I doubt that many concentration camps gave out commemorative shot glasses.
The example is the colt Damien thought he had.If I go into a gunshop the person behind the counter best know what he's talking about,i'll know if he,she,doesnt.Maybe damien doesnt know guns.Maybe he figured the guy behind the counter did,since he was behind the counter.He took it for granted.A man best be knowing guns and ammo to work in a gunshop,the dolt behind the counter didnt belong there.He passed misinformation,and when dealing with guns and ammo,misinfo can get somebody killed very easily.the guy was an idiot.