If you write frequently in notebooks, you'll need a large collection. Some notes are worth keeping, but others can sensibly be dumped. Wipebook allows you to take those temporary notes and wipe them away when you're done, just like a dry erase board.
Unlike a dry erase board, the coating on Wipebook is designed not to smudge or erase too easily (otherwise you'd be regularly headed for disaster). Each one looks like a standard notebook and comes with 25 double-sided pages. When you run out, just wipe a page off and you're set. If you really need to save any information, you can always take a quick picture with your smartphone and save it in an app like Evernote for archival purposes.