Insider Inc. receives a commission from our affiliate partners when you buy through our links, but our reporting and recommendations are always independent and objective. Learn more. After a long day, wouldn’t you love a relaxing soak in the tub? Or is your reality more along the lines of kids’ bath time, aka wet playtime, and if you’re lucky, a quick shower for yourself? No matter how you use the bathtub, conventionally and unconventionally (e.g., washing the dog, cleaning Lego, holding live fish), it should fit your needs and your bathroom. This humble household fixture is a large investment, and there are so many different kinds out there.   Bathtubs are constructed of various materials, like acrylic, porcelain on stainless steel or cast iron, solid surface resin, copper, stone (e.g., marble), and even wood. But what really sets models apart are their types, which include: Other tubs with more bells and whistles include the walk-in tub, designed with a sealing door for elderly or physically disabled people unable to climb into a regular bathtub; the whirlpool, with therapeutic water jets for massage; the air tub, similar to a whirlpool but shoots air bubble...