Abstract: A microwaveable popcorn bag arrangement is provided. The bag includes a multi-ply construction, wherein one or more of the plies, comprises non-fluorocarbon treated paper. A preferred two-ply arrangement is provided, with a preferred porosity of non-fluorocarbon treated paper used as the inner and outer ply. Techniques of folding the bag arrangement providing a desirable configuration, are provided.

Abstract: A collapsed flexible, e.g., paper, bag is provided which contains a charge of unpopped popcorn. Popping of the corn can be carried out in a microwave oven with the bag supported upon a pre-erected or collapsible stand, usually about 2 cm high, attached to the bag. The bag includes upper and lower opposing face panels connected together by longitudinally extending, centrally projecting gussets that are integral with the face panels. Prior to popping, the gussets are folded between the under and lower face panels of the bag and the bag is sealed at each end. A microwave heating susceptor is provided in the lower panel of the bag or elsewhere in the bag if desired. During popping of the popcorn kernels, the bag increases in size and the gussets expand outwardly as the bag becomes filled with popped kernels, hot vapor and steam.

Abstract: A package for holding unpopped popcorn while it is being popped in an oven and which is readily expandable for holding the popcorn after it has been popped, which package is formed from a unitary blank of foldable sheet material such as paperboard.