The powerful LED's in this 16 oz. pint glass cup will brighten up any event! Pour your drink and watch the light show. Your logo or message won't soon be forgotten as it lights up the night! Great for restaurants, bars, nightclubs and more. Pass them around at your next function and really get the party started. Batteries (replaceable) included and installed. Choking hazard, not for children under 3 years old.