The best way to wash delicate wine glasses is with a machine that uses low-pressure water and high temperature rinse water. This assures that lipstick and fingerprints come off the first time without rattling the glass around enough to break it. If the machine requires the use of a glass rack, the 16-Compartment OptiClean™ Glass Rack with Three Extenders (RG16-3) will get the job done. It is designed for glasses that are 4 3/16" in diameter and 7 15/16" tall. Each compartment has full-height dividers to protect the glass from base to rim, because even low-pressure water will rattle the glasses around a little bit.