Gelato, or the plural gelati, is the Italian regional variant of ice cream. As such, gelato is made with some of the same ingredients as most ice-creams around the world; milk (and cream), sugar (and other sweeteners), flavorings (fruits, nuts, essences, etc.) and air are the main ingredients. Other ingredients that stabilize or emulsify may be used to improve the shelf life of the product. Gelato can be made using the hot process, which includes pasteurization, or the cold process, which doesn't require pasteurization. Both processes require a gelato batch freezer, which makes the end product by mixing the ingredients and incorporating air. Like high-end ice cream, gelato generally has less than 55% air, resulting in a denser product.