This is a HOT NEW Item!!! Three AG13 Batteries are included. This clear plastic glass holds up to 10 ounces of liquid. It measures approximately 5 7/8" high. The top of the glass is approximately 2 7/8" across and the bottom of the glass is approximately 2 3/8" across. At the bottom of the cup is a button that turns the glass on and off. It flashes the following color on the bottom of the glass: Blue, Yellow, Red, Orange, and Green, and the colors radiate through the cup. It is an awesome item for Parties, Mardi Gras, Gag Gifts, Bachelor/Bachelorette Parties, Birthday Parties, anything your imagination can come up with! Due to the presence of small parts, this novelty is NOT recommended for children under the age of three.