various options, wait until the pod is completely dry then give it a crush and the pollen will be released.
But make sure it is dry before sealing airtight otherwise it will mould.
I keep my pollen in tupperware boxes when I am storing it, or bags. I have kept them in the freezer, behind my computer in the dark, on a shelf, and it's all been good. Remember, Pollen can be found in bloody archeoligical digs that are thousands of years old, so storing it in a jar when it's dry for a while is totally chicken soup.