MAKER'S MARK LIMITED 2022 BRT-01FOR THE 2022 RELEASES, OUR EXPRESSION IS INSPIRED BY THE UNIQUE HISTORY OF HAND ROTATING 200,000 BARRELS PER YEAR A KEY FACTOR IN OUR DNA AND CONSISTENTLY CRAFTED WHISKY. BRT 1 chronicles the initial three year extraction process at the warehouse's highest point, where extreme temperature fluctuations occur. This results in a higher concentration of barrel extractives, including notes of caramel and toastiness.