retort pouch
A flexible, heat-resistant pouch used for packaging food that is sterilized by retort processing. Common in Japanese for ready-to-eat meals and sauces. Wasei-eigo from English 'retort pack'.
wasei-eigo (Japanese-coined English), from retort pack
See also: レトルトパウチ
This curry comes in a retort pouch.
Food in retort pouches keeps well.