This pack of 4, Sound Responsive LED Bottle Stoppers is the quick & easy way to add a bit of eye-catching colour to your party! Instantly turn any liquor, water, wine, beer or fizzy drinks bottle into a spectacular light show. Each pack contains white, blue, red & green stoppers which are all sound activated & will impress friends & family as they flash in time to your music Static, Strobing & Sound Responsive Modes Compatible with Most Drinks Bottles Pack of 4 Different Colours