Video – Packaging Crash Course: How PET Plastic Bottles And Jars Are Made

Video – Packaging Crash Course: How PET Plastic Bottles And Jars Are Made


Ever wonder how PET plastic bottles and jars are made? Turns out it is a little different then other types of plastic bottles (Extrusion Blow Molding, Injection Blow Molding, etc.). Known for it’s quality and environmental friendliness, PET plastic bottles and jars are made using a unique process called Stretch Blow Molding, or SBM.

There are two SBM manufacturing techniques: Single Stage and Two Stage Process. Both divided into three similar and distinct steps: Preform, Conditioning, and Blow & Stretch. What’s really interesting is that the preform, a test tube shape plastic preform, can be stored in warehouse for later production. Since these preforms already have the neck finish portion shaped, the conditioning and blow & stretch stages focuses on blowing the preforms into it’s final shape that you and I use.

If you want a customized PET plastic bottle shape and color, please visit our parent company O.Berk, for detailed comparison of single stage and two stages SBM process.

For our stock PET plastic bottles and jars, please click here.


Jonathan @ BottleStore
Jonathan @ BottleStore
Jonathan is the Online Marketing Manger of BottleStore and it's parent - The O.Berk Company. In addition to making BottleStore work and run smoothly, Jonathan also enjoy passing on packaging knowledge to help solve customer pain points. He is the chief architect of Packaging Crash Course - a packaging resource hub for rigid glass and plastic packaging site.


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