Cocktail of the week: Koko Negra If you had to list the biggest health food fads in recent years, alongside goji berries and chia seeds, you'd almost certainly find coconut water. Loved by celebrities and gym bunnies alike, aficionados of the drink claim that it is super-hydrating, can help you lose weight and cures all number of physical ailments. It quickly made the jump from health food shop to supermarket - and now, it's gone one step futher, into the bar. According to Elliot Shenton, bartender at La Bodega Negra - a Mexican restaurant and underground drinking den in London - coconut water isn't just for health addicts, but is a useful ingredient in cocktails (well, everything's got a dark side)."Coconut water works great in drinks as it adds a subtle, natural sweetness," he says. It works especially well in long Collins-style drinks for a really refreshing beverage, or simply as a mixer for your favourite spirit. Bodega Negra serves a tropical-tasting drink called Koka Negra, which is made by mixing coconut water with tequila, rum and yellow Chartreuse. Garnished with a strip of lemon peel, it's just the thing to chase away the blues on a cold winter's night. And you can feel - sort of - virtuous afterwards. 20ml coconut rum (the bar uses Koko Kanu) 15ml yellow Chartreuse 50ml coconut water (the bar uses Jax Coco) Shake with ice and strain into stemmed cocktail glass. Lemon twist to garnish.