Polypin storage

[masterosouffle]

I have just seen the link in the other polypin thread, what a great price!
I reckon I'm going to order a few, but was wondering how long I can keep beer in them before drinking it. So into keg, a little priming, condition and then cellar temps - want to do this and then be able to store for a while, maybe a few months before cracking them open, does this sound feasible?
Cheers