Consuming almost seven years of robust internal research and development, the Heineken Draught Keg or "party keg" hit stores in Europe in 2005, waiting another seven years till it was introduced to the U.S. in 2012. Their goal was simple: satisfy consumers who have a preference for draught beer from the comfort of their own homes. Why do people prefer draught beer? There are a number of reasons but the main contributor to draught's supremacy is texture. The foam bubbles on top of a draft beer are a uniform 0.8 to 0.9 millimeters in diameter owing to the carbon dioxide pressure used to push the liquid through the keg system. Bottled beer has to be dumped quickly to create a head and produces bubbles that are a good deal bigger, 2 or 3 millimeters across. Bigger bubbles dissipate more quickly, while the small bubbles persist and produce creamy mouthfeel. Some keg systems use nitrogen or a blend of nitrogen and carbon dioxide in their beer gas which may further promote a r...