Starbucks is 'hiding' its cheapest drink from customers in order to boost profits, it has been revealed. The marketing ploy known as 'product sabotage', in which consumers are cleverly encouraged to buy more expensive and profitable goods, is being used by many major retailers. Starbucks, the high street coffee house chain, has been exposed by a BBC investigation as one of the chief culprits. It sells a drink called a 'short cappuccino' which at 8oz is a third smaller and cheaper than the smallest size on the menu. Staff know what it is and have a button on the cash...