Leftovers should be reheated to at least before serving. The chilled food needed to be reheated before serving. Many companies sell ready-baked frozen pizzas to be reheated in an ordinary home oven. The full mold was annealed (reheated in an oven to ) and cooled. Typically, they are reheated in a microwave oven. The ducks can be reheated at home with an oven, grill or boiling oil. The mixture is then stirred and reheated until it reaches . In these cases, the cooled compressed air is reheated by the incoming air. The glass is cooled down and is then reheated in a second step. Kalakukko can be reheated in an oven. Pre-made curry is available in vacuum-sealed bags that can be reheated in boiling water. Hot sake that has cooled ("kanzamashi" ) may be reheated. As it cools, it is reheated so that the manipulation can continue. The curds are then reheated to for one or two hours. In many cases, they resoften or liquify if reheated.