A system comprising a pre-heater located downstream of where a product stream is formed and upstream of a heater that heats the product stream to a desired temperature, the pre-heater comprising a circulating stream of a first heat transfer stream that pre-heats the food product, a container cooler comprising a circulating stream of a second heat transfer stream that cools containers containing the heated food product coming out of the heater, and a heat exchanger where heat from the second heat transfer stream is transferred to the first heat transfer stream. A method for using the system is also disclosed. The product can be a food product, including but not limited to a beverage. The container containing the heated product can be any suitable container, including but not limited to bottles and cans.