Hi Hacksaw,
The problem with the Crusader Cup is that it is a bit small to reheat the entree pouch evenly, although it can be done. The technique is to boil the pouch for a longer time than is first thought required, say for around 4-5 minutes. You will also need to remove the pouch half way through boiling time and rotate and push the contents of the pouch to the bottom of the pouch then boil for another couple of minutes to ensure that the contents of the pouch are heated evenly.
Using the traditional British army mess tins are even better though, they allow 2 entree pouches to be reheated throughout at the same time. The boiled water can also be used to prepare both a hot drink either tea, coffee or hot chocolate or the soup starter.
I personally dislike MRE Flameless Ration Heaters because of the mess they generate and the lack of their ability to boil or cook food properly (or even reheat the entree pouch evenly), which is not contained within the MRE system itself. How on earth you would cook a pheasant, brown trout or boil rice etc or even boil enough water for a days use with a FRH is beyond me I'm affraid.

The Hexamine cooker has the ability to boil up to 1 gallon of water.
