Formally known as Unkwn, Mystry is a soda brand that is geared towards the teenage audience. 
It's a true mystery as to what flavor each drink is and the only hint at the flavor is the color band around the soda. The idea is that the idea will grab people's attention and the soda itself will keep them coming back for more. 
Shown here are the bottles, both regular and diet forms, as well as a magazine ad and billboards.