I have used the eggs in a jar method (of course I am invoved with the boy scouts) and it works well if the jar is FULL otherwise you end up with scrambled eggs which for most purposes is fine. I haved used both plastic peanut butter jars and nalgene bottles. The good thing about the peanutbutter jars is you can get them in smaller sizes. I think I might try the idea with the wax I like the multi purpose angle.