Whilst shelf life is determined by many factors, such as storage temperature and the barrier
properties of the particular film used, in general, satisfactory shelf stability in excess of two years is easily obtained for a wide range of products in foil bearing pouches. The US military
rations tested over two years at 20◦C showed no significant change in product quality ratings.
Some products have been successfully stored for as long as seven years and found to be safe
and edible.