I suppose that as a contractor, I'm not alone in having sometimes eaten a cold can of soup. But you can also heat it on a stove (if it's been installed yet) Stainless steel water bottles are good for cookin a hot drink. A can of soup can take quite a while to heat since it's tall with small contact with burner. Aluminum foil helps the whole thing heat up.
This could also help when you are moving and the kitchen has been packed up.
Word of caution:
Chicken rice tends to burble violently if not stirred. the gaps between chunks is too small to let steam out readily. I had a can dance it's way to the edge, and fall :(
Also, OPEN THAT CAN!!!!! you don't wanna havta clean beans off the ceiling!