Raise your LED 10 oz Whiskey on the Rocks Glass and make a toast. This light-up acrylic barware appears to have light-up ice cubes in the bottom and leaves room for real ones too. With the push of a button choose 2 light modes from solid on to flashing & blinking. Each LED 10 oz Glass 3 AG13 batteries installed. Batteries are replaceable. Sold by the individual cup. Please order in increments of 1 cup. Please note: this item is not glass. Hand-wash only.