If you want to win a burping contest, drink soda.  If you want to win the World Burping Championship then drink about two gallons of it.  The first World Burping Championship was held at the Hudson Station Bar & Grill in Manhattan, NY and at 18.1 seconds long, pizza chef Tim Janus took the belching title.  He drank a combination of Diet Coke and MT Dew stating that the secret was to "condense all the air in your stomach then bring it to the surface".  Well, it worked.  You can watch the award winning noise below: