Do you remember the world before Perpetual, when Tröegs didn’t brew an IPA? Well, Citra hops and a half dozen Scratch batches later, our beloved Imperial Pale Ale was born. To commemorate the Scratch #500 milestone, we’re putting a bigger, bolder version in your hands. Double Perpetual cycles through copious amounts of Cascade, Chinook, Nugget and Citra hops on its way to stickier notes of citrus, pine and tropical fruit. To infinity…