A cocktail muddler is an essential bit of kit for anyone who ever mixes up a mojito, or concocts a caipirinha. It won’t turn you into a cocktail pro overnight, but it will bring out the best in your ingredients – use it to bruise mint leaves to give mojitos that uniquely fresh flavour, to crush limes to make a tangy caipiroska, or to muddle sugar to make a sophisticated, citrus-y old fashioned.