[zamalek]

I believe it's Epson who have the tank printers, you can put whatever ink you'd like I to them by design.

[gambiting]

Brother has them as well. Hell, even HP does, for their business injet printers[0].

https://www.hp.com/gb-en/printers/smart-tank.html

[bzzzt]

Those are also the printers that track in software if the 'waste ink reservoir' is full (which happends after a certain number of printouts) and brick when they reach the limit requiring you to send the printer to the manufacturer.