In the 1953 novel Casino Royale, author Ian Fleming has our favourite secret agent order this super-sized sharpener to steel himself before a high-stakes card game. He later names it after the beautiful Vesper Lynd, who (spoiler) ultimately betrays. Probably why Bond never orders one again. However, that doesn’t stop the drink being dusted off and slotted into cocktail menus every time he returns to our screens. But there’s just one problem, it’s a notoriously difficult drink to get right. What should be a bracing eye-opener can easily melts into something over-diluted and insipid.