The InterDesign Suction Soap Holster is well-suited for use in bathtubs, showers and bathrooms. The suction cup provides suction on smooth non-porous surfaces such as tile, glass, fiberglass and some metals. The Soap Holster is also open in the bottom to drain water. This keeps the soap dry and helps it last longer. The durable clear plastic used provides long-lasting quality. This is a great product from home or dorm use.