The Modern Burner Unit (MBU)

 The Modern Burner Unit (MBU) is the replacement for the M2 gasoline burner currently used in all army field feeding systems. Compatibility of the MBU with all current field feeding equipment will be achieved by maintaining the same footprint and heat transfer as the M2. The MBU is currently in production and being fielded Army wide. 

Read more here: http://nsrdec.natick.army.mil/media/fact/food/MBU.htm