Troegs HopBack Amber Ale gets its unique name and taste from the HopBack Vessel in the brewhouse. As the hot wort is being transferred from the brewhouse to the fermenters, it circulates through the vessel, which is packed full of whole flower Nugget hops. The result is a delicious beer which begins with a fresh hoppy aroma and delivers a spicy, hop-enhanced flavor. Troegs released a draft-only version of HopBack in September 2002 as part of its "single batch" test brewing program and it proved so popular that it will replace Troegs ESB as the brewery's year-round flagship beer.