This is one of the more interesting (and useful) products we've seen in a long time. The Rocketbook Wave Smart Notebook is the world's first microwaveable notebook. Why would you want to toss your notebook in the microwave? Because when you do, it erases the notebook's contents.
The notebook allows you to take notes that instantly save to Google Docs, Dropbox, Evernote and other other apps. When you fill the notebook up (or just want to start over), toss it in the microwave and the ink turns clear when you use a Pilot FiXion Gel Pen. You can microwave the notebook up to 5 times.
At $27 the notebook won't break the bank either.