What can onion odor penetrate. Is it possible to penetrate confectionary packaging to taint the contents with onion flavor?

Onion odor can penetrate various materials, including some types of plastic and thin packaging, due to its volatile compounds. While thicker or more airtight confectionery packaging may reduce the risk, it's still possible for the odor to seep through and taint the contents, especially if the packaging is not specifically designed to be odor-proof. Therefore, it's advisable to store onions away from flavored or sensitive food products to avoid unwanted flavor transfer.