Notebook manufacturer Magnus Ferreus has developed a new notebook called the Onion Note. True to its name, the notebook will literally bring you to tears every time you write in it. With its pages treated with allyl propyl (the compounds commonly found in onion oil), the heat caused by the friction of writing on the paper causes the compound to evaporate, sending the gas straight up to your eyes resulting in a tearful experience. It literally has the same effect as cutting an onion but without the smell.
Just watch the hilarious commercials for it below
Personally the only practical use I could think of for such a book is forcing to Stephenie Meyer to write lines in that read, “I will never write shit like Twilight again and I’m terribly sorry for sending the feminist movement backwards.”