Mini LED Martini Glasses are tiny cups full o' fun! Fill with up to 3 ounces of vodka (or gin, if you want a real martini) and shoot away, be it at a wedding, New Year's Eve or any formal event. To assemble, simply attach the cup to the base. To activate the slow color change function, press the button underneath. Comes ready to use with 4 replaceable AG10 batteries.