Mondo Knows Facts
Waxed paper inner liners protect cereal from room humidity
Sealed film and waxed paper liners keep dry breakfast grains crisp inside cartons
Breakfast cereal boxes feature a sealed inner liner made of waxed paper or high-density polyethylene film. The barrier prevents atmospheric water vapour from reaching crispy grains, preserving crispness and shelf life. The outer cardboard carton provides structural strength for shipping and stackable display.
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Tags: packaging, food, materials
Waxed paper inner liners protect cereal from room humidity: the short answers
- Where does this come from, and can I check it?
- Sealed film and waxed paper liners keep dry breakfast grains crisp inside cartons. The figure is taken from Smithsonian Institution, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
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