Food approval is obviously the most important attribute of the Benvic compounds used in this type of bottle. However, their barrier properties which ensure that their contents are not contaminated by oxygen, carbon dioxide, aromas or gases, are also extremely important, not to mention their enhanced impermeability to UV. Their mechanical resistance to impact, pressure and creep are vital as they receive a lot of handling on the journey from the manufacturer to the consumer. They can also offer highly rigid blow moulded handles. The finish of the bottles themselves can be transparent, opaque or glossy in a wide range of colours.