Retort and aseptic packaging enable our on-the-go lifestyle. Originally, we used tin cans or glass, but retort/aseptic packages allow us to have the same results with flexible pouches or cartons. These packages are more convenient -- they are lighter, easier to prepare, microwaveable, and allow us to eat food away from home. Unlike their glass counterparts, aseptic/retort packages are shelf-stable and do not need to be refrigerated. We have a greater selection of food available with little effort required. The packages maintain their material integrity and protect the products from contamination (light, moisture, oxygen, microbes) during handling, processing, and transport.