The Ultimate Espresso Martini Kit. For the perfect Espresso Martini, simply fill your Fever-Tree Easy Cocktail Shaker with ice, add 50ml vodka and 75ml mixer, shake for 15 seconds and strain into a glass. By blending the finest Indonesian coffee extracts with sweet notes of vanilla, Fever-Tree Espresso Martini Mixer is rich & smooth, which, when shaken with vodka, makes a delicious, easy and authentic Espresso Martini. The perfect Espresso Martini!Add a free gift message to go along with your new alcohol gift. You can choose to send this bottle directly to the recipient or back to your address to wrap and hand deliver.