Riedel has added a martini glass to their stemless "O" Collection, but with a huge difference. While their revolutionary wineglasses must be held by their bowls, as they truly lack stems, the innovative martini glass actually has a hollow stem that can be filled with your favorite cocktail, be it gin- or vodka-based. The "plinth," as it is known technically, is also grooved, providing a bold new design and a better grip.