The return of Persistence Is Utile Coffee Imperial Stout. The sixth edition of this beer is no different to its predecessors. The beer pours like engine oil and tastes like a luxurious chocolate milkshake. For this edition, we teamed up with local roasters ManCoCo. A firm favourite for morning coffee in the brewery, we've chucked a load of their El Zapote beans from Guatamala to add a savoury edge that balances out this beer's silky sweetness.