What is a Digipak?

A digipak is a cardboard form of disc packaging that is often used for special edition albums. Unlike ordinary plastic jewel cases, these are foldable and have three or four sides to them. They usually include a special features DVD and a small booklet with lyrics and/or general information on the band and album.

I've researched indie folk digipaks and found information that could be relevant to my digipak:

I love the structure of the first digipak, with the inside having a different tone with different images to the outside. I plan on doing something similar to this with mine, while maintaining the indie genre.