York) ensured that colonial drinking would be dominated by beer rather than wine. Until the middle of the 19th century, British-style ales dominated American brewing. This changed when the longer shelf-life lager styles brought by German immigrants turned out to be more profitable for large-scale manufacturing and shipping. The hops in lager had preservative qualities, while non-hopped local ales of the time quickly turned sour and were a perceived risk to drink. The lager brewed by these companies was originally based on several different styles of Central Europe, but the Pilsener style, using mild Czech hops, pale, lightly roasted six-row barley and often adjuncts such as rice and corn, gradually won out. Steam beer, the first uniquely American beer style, evolved in the San Francisco area during the 19th century. It was born out of the desire to produce lager beer without the use of refrigeration. After prohibition ended, the Anchor Brewing Company was left as the sole producer of steam beer. The company was near closure in 1965, whereupon Fritz Maytag, great-grandson of the Maytag Corporation founder, rescued the brewery and with it the steam beer style. Anchor has since trademarked the term "Steam Beer" and all subsequent renditions of the style are now termed California common. D.G. Yuengling & Son, commonly called Yuengling (pronounced "ying-ling"), is the oldest operating brewing company in the United States, having been established in 1829 by David Yuengling, and is one of the largest breweries by volume in the country. Headquartered in Pottsville, Pennsylvania, it is currently the largest American-owned brewery. One of the earliest large-scale brewers was Best Brewing (later renamed Pabst Brewing Company), a Milwaukee brewery built by German immigrant Phillip Best in the 1840s. It began shipping its beer to Chicago and St. Louis the following decade, first by ferry and eventually by rail, establishing an early trans-market beer brand in the United States. Other successful breweries of the era begun by German immigrants in Milwaukee included Valentin Blatz Brewing Company, Joseph Schlitz Brewing Company, and Miller Brewing Company. The Weston Brewing Company was first established in 1842 by German immigrant John Georgian. Georgian brought the tradition of lager brewing with him when he settled in Weston. The brewery was designed to utilize ice from the river during winter and lagering cellars dug deep into the ground to create ideal conditions for his beer which needed to be stored below