You can use either the definite or indefinite form of the noun, but where the possessive should go will differ depending on which form you choose.
When you use the definite form of the noun, the possessive should go after the noun.
When you use the indefinite form of the noun, the possessive should go in front of the noun.
As such, both
glassene våre and
våre glass are correct. The former is more common and colloquial, whereas the latter tends to emphasize ownership.
Hope this helps! :)
Edit: I forgot that
glass is a monosyllabic neuter noun, so its indefinite plural form should be
glass, not "glasser". Sorry about that! :P
Here is a chart for Norwegian Bokmål Personal Pronouns. https://imgur.com/LKNpitU I hope this helps. I got this chart from the following website: https://en.wiktionary.org/wiki/deres#Norwegian_Bokm%C3%A5l