A civilian alternative that is significantly cheaper is a GSI cup http://www.rei.com/product/842865/gsi-outdoors-glacier-stainless-bottle-cuppot- holding either a Naalgene one liter water bottle or a recycled energy drink bottle - will run around $15. To get a bit lighter and significantly more expensive, there is a Snow Peak cup, in titanium, for about $45.

A small pot/cup sometimes comes in very handy, however you do it.