Canadian Packaging

Milk On The Light Side

By Canadian Packaging Staff   

General BASF Polystyrene

An innovative project has paved the way to BASF AG’s success in using a conventional stretch blow-molding machine to create the lightest half-liter polystyrene bottle ever: at a mere 7.5 grams in weight.

This project gave BASF the opportunity to see how extremely lightweight bottles for dairy products can be made of polystyrene using stretch blow-molding methods—and idea that will creative transportation cost-savings, as less weight means lower costs and less consumption of resources.

Because polystyrene has a lower density than PET (polyethylene terephthalate), it can be used to produce bottles that weigh less but have the same wall thickness. Owing to the special properties of this plastic, BASF recommends the new polystyrene type (PS BX 3580) specifically for containers used for milk products. This is an approach that will be consistently pursued together with customers.

Additional information about BASF’s polystyrene is available at; via e-mail at or by calling [+49] (0) 621 60 41446.


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