• HDPE, LLDPE, and LDPE may be used for closures when the melt index of a blend of the closures and base resin employed for the container is less than 4.00
• Polypropylene closures are preferred, and can be marketed as preferred, only when less than 10 wt% of the package weight.
• Any floating olefin-based polymer, or polymer compound, may be employed to make a liner or employed to make an over-molding on a closure shell.

The specifications of resins used for closures, fitments, or liners used for the named family of products will be kept on file for inspection should there ever be need to confirm compliance with MPG criteria.