The bottle material contributes to many factors of the overall package with some being aesthetics and more importantly some are performance related. These performance characteristics are:
- Compatibility of closure, the bottle and cap should be different materials in most cases to stop the closure binding to the bottle. This is also true when combining a PET bottle and Polypropylene cap.
- Compatibility of any induction seal used. When choosing to apply an induction seal there is a bonding layer which sticks to the bottle which needs to be matched correctly for a good bond to be possible.