Today I’m feeling a bit sad for all the used up pens I’ve thrown out over the years, each time grumbling over their unrecyclability. Why? Well for just one week, pens, pencils, and even markers are suddenly recyclable! How so? The garbage-to-green-goods company TerraCycle’s teamed up with Office Depot for Earth Week. Until Sat., April 23, you can take all your out-of-ink writing implements to any Office Depot location to be recycled into new office-supply products like trashcans and desk organizers. There’s even a reward for eco-enthusiasts who’ve been stockpiling spent pens just hoping for this day to arrive. Take in 10 writing implements, and you’ll get a coupon toward a new Sanford product.