I've had 44 gallon and 20 litres drums on legs and they only last about a year or 2 before rusting out when left out in the weather, particularly the 20's. This sucker is 3mm plate, should last a long time. The appeal for me is flatpacking for storing/transporting in the toolbox
A 20 litre drum on legs give out bucket load of heat, but can't be flat-packed (for obvious reasons). The dimensions are 60cm long x 20cm high by 30cm wide, not much smaller than a 20 litre drum.