A cartridge for an Ink-Jet
Not many people know this but the ink in proprietary inkjet cartridges can be some of the most expensive fluid in the world. Other contenders include snake venom and of course various forms forms of alcohol. Maybe that’s why they package it so well.
The reason the stuff is so expensive is hopefully to make it light fast which could be important if your printing your wedding photo’s, but not for your daughter’s 5th birthday party invitations. So if you are investing in a printer check the ink price per ml or whatever and go for the cheapest. For those mega important pictures send them away to be done professionally.