Toilet-Book (a book printed on bathroom tissue)
I like to read books in the bathtub and in a clean restroom. I think there are many people like me who enjoy reading books and magazines in the restroom and I think they would love this product.

Toilet-Book at a Book store
According to the publisher the "Toilet Book" is 30m long doubled bathroom tissue with about 3000 words of summary of philosophy book. It's about 4 dollars per roll, kind of expensive as a bathroom tissue though they are now sold in 30 bookstores in Japan. The publisher says it is difficult to print entire book to a bathroom tissue with current printing technology. But I think it's totally fine otherwise we would keep reading it from the beginning to the end. hey, I've got a better idea. If we can use this printing technology and create new self-learning kit... "Teach Yourself xxxxx(product name) in one roll" and sell (or give) it at TechEd or other Microsoft event... you will be able to gain 30m of knowledge : )