Understand the product environment
Consider moisture, oil, oxygen sensitivity, aroma, light exposure, storage condition and expected distribution. Each changes what the structure needs to do.
Compare the full structure
A format can include more than one layer or component. Review the full structure, closure, seal and printing approach rather than assuming the outer appearance tells the whole story.
Check market and claim requirements
Food-contact, recycling and other claims need to be assessed for the final package and the market where it will be used.