Cospa will begin selling waterproof mini posters of K-ON! and Yuruyuri at the end of this month. The posters will be made of polypropylene and feature the characters from the animes. The posters can be wet in the back to stick onto glass, tile, bathroom, and other similar surfaces. It’ll be easy to re-position too. The posters will be 6 inches long and 9 inches wide. A complete set of 4 K-ON posters or Yuruyuri will cost 840 yen, about $10. It sounds like it’ll be cool to have. I would not mind purchasing these posters.