In this video, a Canon print cartridge is opened up and revealed not to contain the meagre 11.9 ml (0.4 fl oz) of ink it is advertised. The proposed solution is to buy a printer designed to be manually refilled with bottles of ink (such as the featured Epson EcoTank ET-2850), though it has only been tested briefly.
Seriously; I feel like I learned the inkjet-cartridges-are-a-scam lesson when I was a kid and have been all about laser printers ever since. I don’t understand how anyone is still falling for that.