Write, scan, erase, repeat—now at 25 percent off MSRP.

While digital note-taking is certainly convenient, the physical feedback of pen on paper is impossible to replace. With the Rocketbook Reusable Smart Notebooks, you don't have to make a choice. These smart notebooks allow you to archive handwritten notes in the cloud, erase all the pages, and start again. You can grab one now for $19.99 at the PopSci Shop.