Clean Flush. Kohler’s Wellworth Toilet — which has been around for 75 years — hasn’t changed much on the outside, but its inner workings have been completely re-engineered. According to the company, the new version uses only 1.28 gallons per flush and can clear out more than 2 pounds of bulk waste in a single flush, making it virtually plug-free. It comes in 10 styles and six colors and costs $275. Kohler Co., 800/456-4537, www.kohler.com