Example Sites

https://scontent.xx.fbcdn.net/v/t1.0-0/p130x130/13677_538650322812782_322385592_n.png?_nc_cat=110&_nc_ht=scontent.xx&oh=62cb47084adc7ce5ca558559240cd746&oe=5D5ED98D
Promoted brands running the them "Clean" http://www.promotedbrands.com