Every year ‘Studio Brussel’ the best radio station of Belgium is organizing the album top 100. It’s a selection of the 100 best albums ever released. To promote the radio show they have released this cool print ad. Probably some people wont get it, but it’s a reference to the famous album Nevermind by the grunge band Nirvana. This album got 2nd place 2 years in a row. The jar implies they are storing the album for an entire year.