Aquatic recently introduced an acrylic drop-in hydrotherapy tub sized to replace the ubiquitous 60-inch bathtub without any need to move walls. The Starla Tub measures 57 inches by 38 inches by 24 inches and has eight adjustable whirlpool jets. Its built-in backrest, headrest, and armrests make it feel bigger than it is, the maker says. Pricing starts at $960.

Aquatic, 800/945-2726, aquaticbath.com.