Before the era of ink cartridges, printers all contained 75 gallons of salt water and one extremely angry squid. Enjoy the inky fruits of synthetic labor with today's Groupon: for $8, you get $20 worth of ink- and toner-cartridge refills at Cartridge World Greystone.

Cartridge World's team of ink masters reverse-engineer the inner workings of the cartridges of major printer manufacturers, refilling them with their own inks for less than the cost of a brand-new cartridge. Quench the thirsty reservoirs of a spent ink cartridge ($7.99+), recharge containers of toner, or fill an empty big-gulp cup with a refreshing 32-ounce CMYK soda. All cartridges are guaranteed to perform as well as their OEM counterparts, spewing out page after page of vivid photos and toner-laden documents until their tiny dye-filled hearts cease to beat and require another inky defibrillation.