De or het folieverpakking?

The correct Dutch article is:

de folieverpakking

Rule Words ending in -ing: almost always de. See the rule

How to use folieverpakking

the folieverpakkingde folieverpakking
this folieverpakkingdeze folieverpakking
that folieverpakkingdie folieverpakking
our folieverpakkingonze folieverpakking
your folieverpakkingjouw folieverpakking
every folieverpakkingelke folieverpakking
which folieverpakking?welke folieverpakking?
a big folieverpakking / the big folieverpakkingeen grote folieverpakking, de grote folieverpakking