The Glibbi bath brush turns bath water into a colorful experience. To use it, insert one of the included bath bombs into the brush head. When pulled through the water, the ball begins to fizz and releases bright colors directly into the bath water. The set includes three two-tone bath balls that create different color gradients. The bath brush is refillable and can continue to be used with commercially available bath balls of a suitable size. Skin compatibility is confirmed by a dermatological seal.