Let the good times roll with Light up flashing beer mugs! Show off your fun drink with flashing LEDs at birthday parties, BBQs, tailgate parties, sports bars & pubs, ANY night time event. Fill 'er up & get your party on with light up flashing beer mugs. To activate your LED flashing beer mugs, flip the switch on the bottom of the lighted glass. 6 multicolor LEDs will continuously flash.