Flashing Panda 16 oz LED Light-Up Multi-Color Flashing Beer Mug Simple push-button on/off mode selection switch Made of high quality clear acrylic Comes with 3 LR44 (AG13, L1154) button-cell batteries preinstalled! Light-up mode: Fast flashing with 6 color LED lights. 16 oz (500 ml) drink capacity. Weighs only 6.4 oz.