There are plenty of UFO inspired products on the market these days. This Maglev Flying Saucer UFO Bluetooth Speaker is one of the coolest ones around though. It magnetically levitates above its base and plays your music as it rotates. It also has various lighting modes to put on a show.
The UFO speaker can be used without its base. It lasts up to 8 hours on battery. You can order this in silver, black, and various other color combinations.