We're using the black, plastic "margarine container" style bowls from the frozen Won Ton soup sold in six packs at Costco. The containers are boilable and seal just like a butter/Parquet tub, but will fit the cheapo-light measuring cup from a classic "Scout" clamshell mess kit. We make reflectix cozies for each, including a disc on the lid, and then toss one of those plastic cups inside.
Now, each guy has a drinking cup with measuring marks, a big bowl/cup/scoop that keeps food hot, can be held with hot stuff in it, doesn't burn lips and is super easy to clean (finger/lick, then add 1/4 cup hot water, seal, shake until the steam swells it, pop and drain/drink --sanitized). Since some of us are buying the soups anyway, cost of the kit is limited to the Reflectix.