I make beef chili and chicken on a bed of rice with corn and garbanzo beans. The juices from the chicken flavor the rice and keeps it moist. I put it in pyrex glass containers with no leak lids and freeze them. They stay cold for ~16 hours. With the dinners I pack 16oz lunchmeat packages from Hillshire Farm, mustard, Jam in a squeeze bottle and a loaf of whole wheat bread. After the dinners thaw I fill a medical type Ice bag (from CVS) which stays cool for ~14 hours.

This covers all meals on a four day.

Downsides:

Cooler weighs 15 pounds when full.