England
Bob (of Bob's Bitters) has teamed up with the Difford's Guide folks to create some particularly vibrant bitters to lift the flavour profile of the already rather vibrant Margarita cocktail! Featuring a secret recipe (though lavender has been revealed to be a core ingredient), four drops will bring the beautifully fragrant agave notes of the Tequila to the fore.

Several of my favourite cocktails from diffordsguide.com have this as an ingredient, including the irresistible ‘illegal margarita’ and the finest ‘Royal Bermuda Yacht Club’ daiquiri. It’s cheaper here than on the diffords site and it really does add that extra bit of perfection to the taste. I liked it so much I also bought a friend a bottle for his birthday.