Hershey's Kisses, invented in 1907, have been produced continuously except during World War II. The foil wrapping preserves chocolate freshness by protecting against air, moisture, and light for two years or more. Unlike other packaging materials, foil molds to the chocolate shape and is light, making transportation efficient. While aluminum is more expensive than plastic, the efficiency offsets its cost due to its thin design, about 0.00035 inches thick. Proper wrapping is critical since exposure to oxygen and moisture degrades chocolate quality, causing spoilage and off-flavors.
Hershey's Kisses have been in production since 1907, except during World War II, when aluminum was rationed for military use.
Foil not only protects chocolate from air, moisture, and light, but also preserves its taste for two years or more.
The foil wrapping for Hershey's Kisses is incredibly thin, at 0.00035 inches, making it about half the thickness of normal kitchen foil.
Oxygen and moisture can significantly degrade chocolate quality, causing oxidation and spoilage if not properly protected.
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