With our flashing shot glass you're sure to win. They start to light up when you pour liquid in. So get five or ten, they don't cost a lot. Hey, what the heck. Just give it a shot. Height: 3.3 in. , 8.38 cm. Width: 2.0 in. , 5.08 cm. Volume: 2 oz. LED Colors: Rainbow Batteries: Batteries for these flashing shot glasses are NOT replaceable.