Buttons were in sheradised steel or plastic resin.

This system was introduced to make separation of the many similar-appearing plastic resin types easier for recycling centers across the country.

Aluminum bottles contain a plastic resin or epoxy liner to protect contents from taste and odor transfer.

Rising oil prices led to higher costs for the plastic resins that make up 20 per cent of the company's raw materials.

This may be reduced by coating with water-impregnable material such as various plastic resins.