Bath bombs are very concentrated in color and make a beautiful piece of art for the bath. Some float and others sink due to the amounts of oil and cocoa butter added. So while they are activating, it is suggested to hold them on the surface for better bath decoration. However, if you decide to hold them, it may cause slight discoloration of the skin. If this happens, it usually comes off with a quick scrub. All bombs contain cocoa butter, so please exercise caution when entering or exiting the bath.