Wiktionary
n. (context military camping English) A metal cup which can be nested on the top or under a canteen.
Usage examples of "canteen cup".
He helped himself, then offered the canteen cup to Taylor, who nodded and smiled.
He set the mug be-fore Howe and the canteen cup before Smith and then left.
He detached the canteen cup and filled it from the lake, tasting it cautiously.
Gunny Lacey came back through the flap with a white china mug of coffee in one hand and a canteen cup of coffee in the other.
He set the mug before Howe and the canteen cup before Smith and then left.
He set one of the blue tablets on the ground in the middle of the stove, then pulled out his canteen cup.
That time a couple of days ago when you reported yourself for not polishing the inside of your canteen cup—.
He couldn't understand the reply, but after a bit someone handed him a canteen cup and he drank, probably river water, he decided.
Zimmerman looked around the crowded room until he spotted PFC Thomas McCoy, who was sitting with half a dozen others at a crude table drinking beer out of a canteen cup.
But I must have been looking pretty bad, because after a while he came by with a canteen cup and set it down on the computer top.
He grabbed the bottle and poured a drink into his own canteen cup.