Well my interest and work most likely differ from yours, I work largely in Garden design and hard landscape including pizza ovens and koi ponds. My hobbies include steam punk, so I could use the vessels for many, many ideas ranging from RO
water storage to garden
art.
For myself I would look into getting one sand blasted and polished, cutting out and forming a door or two, possibly an
oven compartment and powering it with a six inch vortex
rocket stove.
From a commercial point of view I would maybe think about an outdoor feature, maybe as part of an out door kitchen but I would probably have to stare at it for a few days to get more inspiration.