Who doesn't love music?
"Music” is a song by Madonna, which was released in 2000. The song is a celebration of the power of music to bring people together and lift our spirits. Geocaching does the same for me and when combined with music, it makes for fun, upbeat, adventure filled days.
You're looking for an Altoid's type container that celebrates music, both inside and out.
As always, please use stealth.