Lenova has redesigned its stainless steel sinks to eliminate the yuck factor. Instead of a simple hole in the bottom that requires putty to seal, the drain is drawn and flared like a funnel. The drain fittings (or disposal) attach to the outside and seal with a rubber gasket. What the owner sees, and has to clean, is a one-piece sink from top to bottom. Dozens of sinks that incorporate the PermaClean Drain System are available for prices ranging from $260 to $1,750.