a few years ago i was looking around for a good mess kit stove combo.each of those kits in the photo has some sort of stove inside.
Esbit.small Gaz or Coleman fuel,a Trangia burner were the main choices that could fit.the long box on top is a cooking grate and pots kit made for a open fire.
sorry to say i never took and shots of the stoves with the burners inside! i'll make that a rainy day project.