A bathtub, also known simply as a bath or tub, is a container for holding water in which a person or animal may bathe. Most modern bathtubs are made of thermoformed acrylic, porcelain-enameled steel, fiberglass-reinforced polyester, or porcelain-enameled cast iron. A bathtub is usually placed in a bathroom either as a stand-alone fixture or in conjunction with a shower. Modern bathtubs have overflow and waste drains and may have taps mounted on them. They are usually built-in but may be free-standing or sometimes sunken. Until recently, most bathtubs were roughly rectangular in shape, but with the advent of acrylic thermoformed baths, more shapes are becoming available. Bathtubs are commonly white in color, although many other colors can be found.

A drop-in bathtub is a bathtub that has been finished on all sides with a lip or rim, allowing it to be fastened or secured to a finished alcove or structure commonly referred to as a surround. This design allows you to simply ‘drop in’ your bathtub, obscuring the outside of the bathtub completely by the surround so only the interior of the bathtub is visible. The surround can be constructed from anything ranging from natural stone to wood and can be raised high or constructed at feet level. This install method is what separates this bathtub design from a freestanding bathtub which can be placed and installed anywhere there is room in your bathroom.

Freestanding bathtubs sit on the floor of your bathroom. They don't attach to a tub surround or deck structure. You can place a freestanding tub anywhere you like in the room. They are available in a wide array of shapes including oval, rectangular and circular, as well as in a wide array of bathtub materials, including wood, cast iron, acrylic, and copper. On average, freestanding tubs cost less to install than built-in tubs.

Massage bathtubs integrate massage with bath. The massage bathtub bottom and four walls all have a small hole, that is used for the jet water. Through the four walls of high-pressure water to stimulate the human body acupoints to relax, the bottom of the nozzle can play the role of massage back, the combination of the two can more perfect relieve pressure.

An acrylic bathtub is a bathtub formed by vacuum sheets of acrylic, which is then reinforced with fiberglass. The surface of an acrylic bathtub is relatively soft and not very rigid. Acrylic tubs can be reinforced with fiberglass, which will increase durability and rigidity. The acrylic bathtubs offer good heat retention, keeping bath water warm for longer than many other materials. And also, they are easy to maintain and repair.

A plastic bathtub is made of a heated polymer composition and then dried into plastic sheets. Glass sheets reinforce the plastic that compresses together for increased strength. A giant suction machine molds the plastic into the shape of a bathtub. Plastic bathtubs actually consist of either molded fiberglass or acrylic, which are similar in appearance. Known for their nonporous surface, durable finish and longevity, plastic bathtubs are prevalent in home bathrooms.

Shower trays are two-toned and have a key function: to hold a basin under the tap (or shower) and to provide storage space underneath. Shower trays can be custom-made to suit a certain room and purpose. Shower trays are made from a variety of materials such as stone resin or acrylic. Acrylic shower trays are lightweight and are usually around 4.5mm thick and reinforced with wood. An acrylic shower tray allows for greater flexibility, but with more flexibility comes a higher chance of breakage.

As the world's first and largest manufacturer of whirlpool products, Jacuzzi is committed to state-of-the-art design, safety and technology. While the company is best known for its innovative whirlpool baths, the Jacuzzi company also designs and manufactures a wide range of non-jetted baths, shower systems, shower bases, faucetry, portable spas, above-ground swimming pools, swimming pool equipment and pumps, as well as agricultural, sump and sewage pumps.