8 ounces of glow-in-the-dark fun! The Glow Bubbles bottle should be exposed to strong light prior to use. The longer and stronger the exposure the better the results will be. Pour generously into running bath water and when ready, turn out the lights. Relax and enjoy the soft green glowing bubbles. You may recharge the glow if you turn on the lights for a short time but remember the results will be better if you close your eyes while the lights are on.