Let’s say you have 9000 gallons of Jet-A fuel you need to move a long distance and all you have is a C-17 and some rubber bags. Well you can turn those rubber bags into fuel bladders. Basically they use heavy-duty ratchet straps to secure the bladder to a pallet so they can easily move it around. When the aircraft lands it can pump directly to fuel trucks or you can offload the pallet itself. The C-17 is an amazing aircraft.
Here is the C-17 transporting a tank