Add another entry to the stealth drain category. This one, Infinity Drain, is a linear product that also adds architectural interest. The collection eliminates the traditional center drain that requires pitching the floor in four directions and instead requires pitching in only one direction. Made from stainless steel, it comes in a variety of designs. Sizes range from 36 inches to 96 inches. Cost: $335 to $1,500. Infinity Drain. 516-767-6786. www.infinitydrain.com.