The handy machine-made Pinot and Nebbiolo glass of the space-saving glass collection O wine tumbler attracts attention through its stemless design. This makes it less susceptible to glass breakage and easy to put into the dishwasher. The shape of the bowl supports flavor and the taste of plum in sensual Red wines. "O" Is the ideal glass for everyday use and for every occasion. It is fun, feels good to hold, looks trendy and it works! All Riedel glasses are dishwasher safe.