Our business idea is to reverse the job of printers. Our product/machine will be able to remove ink off of paper in order for people to reuse the paper they print on.
My hornet repellant doesn't kill hornets, but it repells them, and it's all natural. It comes in different sizes, 8 ounce and 4 ounce, and you can spray it on yourself (except for on your face), and in your house, too.