Fun Central P915 LED Margarita Glass Black Stem - 7 Ounce SIZE: The 7oz LED Margarita Glass Black Stem measures approximately 7 inches and a diameter of 4.5 inches LIGHT FUNCTION: The button on the bottom of the glass allows you turn on 3 ultra-bright multicolor LEDs with 7 functions to click through (green constant, red constant, blue constant, purple constant, green-blue constant, red-green constant, red-green-blue constant, and color-morphing). INCLUDED: Batteries: 3, AG-13. Replaceable, included and installed. MANUFACTURING: Hand wash only. Some assembly required to prevent breakage in shipping. This is made from high quality materials that are ensured to be safe, non-toxic and environmentally friendly.