Well, this made me laugh. The very first color inkjet I ever saw (circa 1987) used refillable reservoirs, and simple squeeze bottles of ink. The printer (Tektronix) was pricey - perhaps $1600 1987 dollars - but cost almost nothing to operate. I think an 8 oz. bottle was six or seven bucks.
BTW, that printer was a wide-carriage, 300 dpi model with a SCSI interface.