Mount Gay Eclipse rum is produced from molasses that is double distilled and aged up to 2 years in white Kentucky oak ex-bourbon barrels. Mount Gay is the oldest existing rum brand in the world, with its oldest surviving deed being from 1703. The company developed the use of traditional double copper pot stills, a process that has been in continuous use by Mount Gay ever since its founding. The company's namesake Sir John Gay Alleyne was a good friend of John Sober who purchased the then Mount Gilboa distilleries in 1747.