The handy machine-made single malt whisky 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 design incorporates a small, slightly out-turned lip that directs the spirit onto the tip of the tongue, where sweetness is perceived and serves to bring out the elegant creaminess of a top-quality single malt. 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.