COOP Ale Works DNR

New to the forum (first post!), slightly new to cellaring and aging.

I used to live in Oklahoma and had access to the delicious gem DNR. Before I left I bought ten bottles and have been drinking them slowly over the past 2.5 years. It's getting better with age, but I couldn't control myself and I only have one bottle left. Trying to see if anyone out there has aged this beer and might know when it peaks. I emailed COOP and they estimated it would be good out to ten years, but that's just hypothesis not proven.

Sidebar: heard it's only in cans now. Truth? No bottles? Thoughts on how this will effect the ability to age? When I was there it was only offered on draft or bombers.