I have ink cartridges which I no longer need. They are compatible with MG6820, MG6821, MG6822, MG5720, MG5721, MG5722, MG7720, TS5020, TS6020, TS8020, TS9020 printers. They are: CLI270BK Large black (3) CLI271XL Magenta (3) CLI271XL Cyan (3) It seems a shame to just throw them away. If you want 'em, you got 'em!
I have a Canon PIXMA TS312...