glass for German pilsner beers. Sizes are typically around , but can be as large as . When used in restaurant settings, a small piece of absorbent paper is placed around the base to absorb any drips from spilling or condensation. Beer boot Beer boots (Bierstiefel in German) have over a century of history and culture behind them. It is commonly believed that a general somewhere promised his troops to drink beer from his boot if they were successful in battle. When the troops prevailed, the general had a glassmaker fashion a boot from glass to fulfill his promise without tasting his own feet and to avoid spoiling the beer in his leather boot. Since then, soldiers have enjoyed toasting to their victories with a beer boot. At gatherings in Germany, Austria, and Switzerland, beer boots are often passed among the guests for a festive drinking challenge. Since the movie Beerfest appeared in 2006, beer boots have become increasingly popular in the United States. Glass beer boots are either manufactured using a mold or from mouth-blown glass by skilled artisans. In Germany, beer boots usually contain between 2 and 4 litres and are passed from one guest at the table to the next one clockwise. When almost reaching the bottom of the boot, it suddenly starts bubbling. By some accounts, drinker who caused the bubbling has to order the next boot. There are also boots known with 6 and 8 litres. That being said, beer boots are almost never seen in Germany, even among friends who do drink as much and more beer on an evening out together; normal glasses are preferred. Beer festivals Oktoberfest is a 16- to 18-day festival held annually in Munich, Bavaria, Germany, running from late September to the first weekend in October. Only beer which is brewed within the city limits of Munich with a minimum of 13.5% Stammwürze (approximately 6% alcohol by volume) is allowed to be served in this festival. Upon passing this criterion, a beer is designated Oktoberfest Beer. Large quantities of German beer are consumed, with almost 7 million liters served during the 16-day festival in 2007. In 2015 the festival officially served 7.3 million liters of beer. Other festivals include The Cannstatter Volksfest in Stuttgart. The Gäubodenvolksfest in Straubing The Bergkirchweih in Erlangen The Hanover Schützenfest The Freimarkt in Bremen The Augsburger Plärrer in Augsburg The Nockherberg Starkbierfest in Munich