Mountain Lumber has acquired wooden planks from 100-year-old barrels once used by Ireland's Guinness brewing company and has repurposed them into a limited-edition flooring line called Entique Guinness Oak. The English brown oak reclaimed from those storied vats has been kiln-dried and re-milled into boards that showcase their distinctive markings and knots. Mountain Lumber Co., 800.455.2671; www.mountainlumber.com.