The handy machine-made spirit 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. This glass enhances the flavors and aromas of spirits with its small sized bowl and the narrow rim opening. "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.