What is a common use for PET plastic?

PET plastic, or polyethylene terephthalate, is widely recognized for its application in packaging, especially in the form of blow-moulded bottles used for beverages. The characteristics of PET make it well-suited for this purpose; it is lightweight, strong, and provides a good barrier to gases, which helps preserve the freshness of the beverages inside. The process of blow moulding allows manufacturers to create bottles of various shapes and sizes efficiently, enabling mass production at a low cost. Additionally, PET is recyclable, which aligns with increasing environmental stewardship in packaging.

While other options may involve plastics, they do not represent the most typical or efficient use of PET. For example, cups and plates might be made from other types of plastics that are more suited for that purpose, safety helmets often require materials with high impact resistance and durability that PET does not provide, and high temperature applications generally involve plastics designed to withstand greater thermal stress. Therefore, the commonality and effectiveness of PET in beverage containers firmly establish it as the correct choice in this context.