What is a good English phrase for "produktionsbedingter Leerraum"?

The literal meaning is "an empty space caused by production" and tells buyers that the half-empty cookie box is a feature.
['https://german.stackexchange.com/questions/643', 'https://german.stackexchange.com', 'https://german.stackexchange.com/users/4/']
The technical term in the US is ["slack-fill"](http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?fr=100.100), however consumers aren't likely to know what this means. (In terms of potato chips and other vacuum-packed goods, this is also called "headspace"):

> 
> *Slack-fill is the difference between the actual capacity of a container and the volume of product contained therein.*
> 
> 
> 

In order to explain this concept to consumers, you'd probably need to resort to a more descriptive sentence instead of a technical term. The other answers have provided some suggestions, although they do feel somewhat clumsy. 

My additional suggestion:
Product packed with empty space for transportation.
Such a thing doesn't appear written very often, and translating compound words tends to always produce clumsy results.

I would propose either 

> 
> Free space from manufacturing
> 
> 
> 

(short for "free space resulting from the manufacturing process")

or

> 
> Manufactured free space
> 
> 
> 

As a label, perhaps

> 
> Space left free by design
> 
> 
> 

would work.