Metal cans offer the opportunity to package an airtight container, which may be sterilized by heat if necessary. These containers are capable of withstanding a great deal of physical shock in shipping and storage. They also offer protection againast light, oxygen, or other gas permeation through the walls of the container. It protects against permeation of essential oils; i.e., flavors and fragrances that may be the essence of the product's appeal. Food, beverages, paints, solvents, waxes and a wide range of chemical products are commonly packaged in metal cans.

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