Hunter x Hunter: Fun Fun Cloth

The Fun Fun Cloth is used by Owl to shrink whatever ends up in the cloth, whether it be an object or a living being, without any physical harm. The size of the fabric can change according to Owl's will. It also seems to be very durable, as it was used to successfully envelop a car in motion. Owl can then bring the object back to its original size by uncovering it.