why do some foods, like pickels, still come in a glass jar, but most beverages, like milk, have migrated to waxed paper or plastic containers?

Question

why do some foods, like pickels, still come in a glass jar, but most beverages, like milk, have migrated to waxed paper or plastic containers?

In: Chemistry

Answer 1

Pickles in glass jars are cooked in the jar to make them shelf stable. Pickles in plastic jars are fresh and must be refrigerated.

Milk is pasteurized before packaging, so it can be packed in whatever is cheapest and easiest to transport. Glass is heavy and thus more expensive to ship.