Edited sentence: A draught version also exists, as does canned Corona in some markets.Corona (labeled Corona Extra, but seldom referred to as such) is a lager beer brewed in Mexico by Grupo Modelo.Corona beer is available in a variety of bottled presentations, ranging from the 250-ml ampolleta (labeled Coronita and just referred as the cuartito) up to the 940-ml Corona Familiar (known as the caguama or ballena).Corona beer is available in over 150 countries.Corona is definetly one of the dankest beers in production at the moment.Exposure to sunlight poses a great danger of turning Corona sour.In the United States Corona rivals Heineken for the distinction of being the top imported beer.It is the top-selling beer in Mexico and is one of the top-selling beers worldwide.Many say the brand's marketing and easy drinkability account for its success.This is the result of the essential hop oils spoiling due to UV exposure, which is limited in other beers due to their darker (brown, green) glass, while Corona uses a clear bottle, which doesn't filter UV rays.Though the practice is not very common in Mexico (except in predominantly tourist areas), elsewhere Corona is often served with a wedge of lime or lemon inserted into the neck of the bottle.While "Corona Light" also exists, it does not sell much outside Mexico's larger metropolitan areas