A pocket sandwich is a sandwich which is made using a single piece of folded or hollowed bread, such as a pita, tortilla, or even a wrapping (used to make egg rolls) which is made from dough cooked with fillings inside.
Pita sandwiches can be filled with most common sandwich ingredients, however some fillings that are traditionally eaten in pita sandwiches have come to also be used as terms for such pita sandwiches, by synecdoche. These include:
The US Army has developed shelf-stable pocket sandwiches as combat feeding rations (the First Strike Ration) for its troops on-the-go. The sandwiches are engineered to prevent microbial growth through the use of specialized water treatment, acidic content (naturally, through ingredient selection; or by the addition of food-grade acids), special multi-layer foil packaging, and oxygen-absorbing packets.
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