This eco-conscious bubble bath comes in an anhydrous, solid bar form so you can skip the package. Featured surfactant Cola ® Mate LA-100 MB is included to provide a luxurious foam that puts a bubbly twist on traditional bath bombs. This mild, biodegradable surfactant comes in a dry powder for a water-free and sulfate-free* formulation. To use, simply crumble under running water as you begin to fill the tub. *No sulfate surfactants