Milkshakes will be exempt from the forthcoming 'sugar tax' announced in today's budget - despite some of them containing more sugar than Coca-Cola. Mars Flavoured Milk, for example, contains 12.8g of sugar per 100ml, while Frijj Chocolate Fudge Brownie has 12.9g. These compare to 10.6g in 100ml of Coca-Cola. While all of the sugar content of Coke is from added refined sugar, milk drinks contain a mixture of added and naturally occurring milk sugars. Semi-skimmed milk has 4.8g of sugar per 100ml.