Clean Yourself Up with Golden Darkness
What better way to clean your hair than with an anime that makes me you feel dirty. Even more so, using a character within the series that might make you feel dirty for liking since she's basically a sexualized loli. But maybe that's why she's the perfect choice to make you feel clean again.
Cospa will be selling a To Love-ru shampoo bottle which features Golden Darkness (aka Konjiki no Yami). Yeah, it's a really unusual toy/accessory/toiletry/whatever to release. There's no real rhyme or reason for its existence, but at least it does have some nice fan art on it! Personally I'm holding out for one with Mikan on it.
The shampoo bottle goes on sale in late May in Japan, & retails for 900 yen (~$10).
Source: http://www.cospa.com/detail/id/00000033557