When Corona became a competitor to Heineken, a Heineken retailer started a rumor that Corona beer was in fact urine.  For years, the sales of Corona suffered.

http://www.atlasobscura.com/articles/inside-churchills-secret-subterranean-wwii-bunker-in-london?utm_source=Atlas+Obscura+Daily+Newsletter&utm_campaign=af287e1fe9-Newsletter_11_7_2016&utm_medium=email&utm_term=0_f36db9c480-af287e1fe9-63559213&ct=t(Newsletter_11_7_2016)&mc_cid=af287e1fe9&mc_eid=a58ea5cd8b

Published by David Fahey