The London-based Speciality Drinks Ltd is the brainchild of Sukhinder and Raj Singh, two brothers with nearly 50 years of experience in the drinks business between them. They went online in 1999 with the launch of The Whisky Exchange, a site that has grown to become a top retailer of whisky, fine spirits and liqueurs—including Black Tot, a rare bottling of the last stocks of authentic British Royal Navy Rum.