Useful roll / toilet-paper roll

-Water tissue type toilet paper roll-

Water tissue type roll is a design to change the paradigm of "toilet paper roll necessarily remains after using toilet paper!"
Using the principle that when the felt, which is the source of water tissue, is strongly compressed, it becomes harder,
the water tissue type roll increases in volume when it becomes wet with little amount of water, and it can take the role of smooth water tissue.

Water tissue type roll can be used in various methods.
Also, the toilet paper which even had its roll used will not leave anything.