My mate works on the bin lorrys, if they doing one street normal waste, and they finish the round and still have space on the wagon, they drive to another round and start collecting there, does not matter if it's recycling or normal waste they just collect and all goes into same wagon
I have always bought a printer that has a comparable CISS system, just fill up the bottles that go on outside of the printer, stick cartridge in and route the little ink tubes, jobs done, then just buy cheap ink anywhere, I have even done this with the sublimation printers that I have