March 1, 2024
Filter chemistry stresses packs differently than body lotions
Organic UV filters and solvents can swell seals or interact with inks. Inorganic dispersions can abrade internal surfaces over repeated squeezing. Sunscreen is rarely "just another creamfor compatibility folders.
Heat in the supply chain
Container yards and summer trucks impose temperatures rarely modeled in mild stability chambers. Run elevated storage that mimics destination corridors, not only 25 °C office defaults.
Consumer misuse as a design input
Beach sand, salt spray, and partial reclosure change torque and grit ingress. Rounded shoulders and forgiving threads help; sharp flash does not.
Closing
Start sunscreen packaging projects with filter-and-solvent disclosure to the tube supplier. Secrets here cost more in recalls than in competitive advantage.