Breweries in MN can’t sell growlers once their production hits 20k barrels/yr. https://bringmethenews.com/minnesota-lifestyle/castle-danger-can-no-longer-sell-growlers-but-wants-to-change-the-law
Thing is, we should actually keep this rule since it gives smaller breweries an advantage over large ones.
The correct winning solution for Castle Danger and everyone else: keep production < 20k barrels and **raise prices**! The demand is clearly there.