In its most basic form, acrylic is a transparent thermoplastic, which is often seen as a great substitute for glass. It has many similar properties but without the propensity to shatter. It also isn’t as heavy and can be formed into any shape that you want. These tubs are made using colored vacuum sheets of acrylic, which are usually reinforced with fiberglass for even higher durability. The mix of materials works perfectly, and the acrylic can then be worked into a wide range of different designs.