Products like the "Universal Inkjet Refill Kit" claim to save you money by letting you refill instead of reinvesting. This week, we put it to the test in our "Does It Work?" report. "Refill any inkjet ...

You can gather the parts and modify your printer yourself, but Cool Tools recommends Cobra Ink, a company that does the modification for you for $50-$100 over printer's MSRP.

Insert the syringe into the hole and slowly inject the ink until the cartridge is full. Then seal the hole with a plug, also in the kit, and make sure that it is air-tight.