In the search for wedding rings, I found one very strange photo. The wedding rings on the photo are in a coffin-shaped box. More to the point, this form of boxing might seem to be not only a weird but a frightening decision for a wedding ring.
However, a search revealed that these coffin-shaped boxes do not contain a negative content and carry the idea of being together forever and after life. The source of inspiration was the animation "The Nightmare Before Christmas".