Designers Daniil Rassadin and Alexander Malinovsky have created a palm size eraser, which is fashioned like the well-known Delete Key on a computer keyboard.
Tersumus will be available for sale on July 10. Before June 10 price will be 8.8 US$, after June 10—10.5 US$. The designers claim the eraser will last for years. Maybe if it doesn't get much use it will last a long time.
Personally, I seldom have a need for an eraser, but why not use one that is fun as well as serviceable.