I like to get some frozen meatballs, and really give them a hard freeze with dry ice... so they're basically little rocks. Then use what's left of the dry ice and the meatballs as the ice in your food pack.
By night 2, the meatballs are ready to cook with some spaghetti and sauce. Or mac & cheese.
Or some bloody Mary Mix... Bloody Mary Meatball Soup also sounds pretty tasty.