Caps are designed to fit tightly to withhold the downward shake motion. Boost your Barware. Heighten Aesthetics for your Mixology Apothecary. Launch homemade bitters and elixir exploration. Japanese inspired glassware. A must-have for a home mixologist. Used in the preparation of popular drinks like (a proper) Old Fashioned, Manhattan, and many other libation creations. Pour Angostura, Peychaud's, or any other of your favorite bitters into these for a more refined, cleaner bar top.