These FDA approved, Dream Glow glow-in-th-dark cups are sure to wow the crowds at any parties. Activate the glow-in-th-dark fluid in the enclosed base of the cup and watch as the liquid swirls, twirls and glows for up to 6 hours. Each pack holds two cups, each with a capacity of 12oz. Each glow cup can only be activated once and should be discarded after use. This product is not dishwasher or mircowave safe and should not be used with hot liquids. Not suitable for children under the age of 3 years old. There are four different colours of the glow cups to choose from: blue, green, yellow and orange. Dream Glow glow-in-th-dark cups ensure that any birthday party or celebration will be exciting and memorable.