Since 2005, office supply store Staples has been accepting old ink and toner cartridges for recycling and rewarded customers with $2 in store credit for each one. Now there’s no need to visit a store to recycle. Visit Staples.com, and you can recycle your used ink and other toner cartridges through its online recycling program. It’s simple: You can recycle up to 10 cartridges at a time, and Staples will provide a free prepaid shipping label to ship the store the cartridges. And you still get the $2 reward for each item you recycle.