Full-service restaurants, soda fountains, and dinersusually prepare and mix the shake by hand from scoops of ice cream and milk in a blender or drink mixer using a stainless steel cup. Many fast foodoutlets do not make shakes by hand with ice cream; instead, they make shakes in automatic milkshake machines which freeze and serve a pre-made milkshake mixture consisting of milk, a sweetened flavoring agent, and a thickening agent. However, some fast food outlets still follow the traditional method, and some serve milkshakes which are prepared by blending soft-serve ice cream (or ice milk) with flavoring or syrups. Milkshakes can also be made at home with a blender or automatic drink mixer.