That first black one with the shiny interior looks perfect for a UDS build... No liner! do they smell like chemicals? That is a good price for a drum with removable lid...
Drill the lower intake holes first, then rinse / scrub and start a brush fire to clean 'er up....
Building "Robot", my UDS:
UDS "Robot" (the easy smoke oven), CL CharGriller w/sfb, Stok Quattro