Title: Buy a refill kit instead
Review: After years of buying these I finally bought a refill kit in Tesco for less than 8 euro which contains 90mls of ink (yes 90) plus everything else you need. Filled my HP 21 cartridge with 5mls of ink, took just 5 mins and it works perfectly. 17 more fills left @ 45 cent each. Might not get 19 runs from the same cartridge but I have old cartridges I kept (they were too expensive to throw away even when empty). And the kit comes with cleaning fluid for old cartridges with dried ink in the nozzle. It kills me to think of all that money I've spent on new cartridges over the years - never again, total and utter rip off.
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