Cool barware item!  The flashing LED rocks glass contains 5 led lights in the base to light-up your party!  The light-up rocks glass is made of a durable clear arcrylic resin that won't yellow or scratch.  The light sequence is controlled by a push button on/off/flash mode switch on the bottom of the glass.  Batteries are included and replaceable.  Each glass is packaged in an attractive gift box making them suitable for resale at your club or restaraunt.