The Irish Heart Foundation have proposed the introduction of volumetric tax on sugar sweetened drinks to increase prices by at least 20%. A volumetric tax, such as that applied by France and Finland to sugar sweetened drinks, is traditionally levied by reference to a particular volume of product, such as per hectolitre. Given retail prices are at the discretion of the retailer, and given the range of retail prices charged throughout the market, it is not possible to introduce a rate that would increase prices by 20% across the market.