Most expensive cocktail: 15,250 pounds a pop

The world's most expensive cocktail contains a diamond ring instead of an olive!

The drink, created by Harvey Nichols in Manchester, has to be escorted to diner's tables flanked by security guards. The dazzle cocktail contains a six and a half carrot pink tourmaline and diamond ring set in 18-carrot white gold.

The drink was the brainchild of senior bartender Jay Malik, 24, who was asked to devise a drink to fit with the restaurant's Pink Dinners month. A special safe has been brought in for the bar to keep the rings in and customers can choose any ring they want from the range - the most expensive being a 27,000 pounds sterling two-carrot engagement ring.