A 144 person beer bong created for the Milwaukee, WI celebration of Harley Davidson’s 105th anniversary is considered to be the world’s largest (self-proclaimed). It was made of PVC pipe, plastic hoses and 2X4 wood craftily engineered to allow 144 people to drink at once. Two full kegs supplied the booze and 144 thirsty bikers supplied the mouths and stomachs. Awesome.
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This contraption is an interesting curiosity but a beer bong it is not. It is still super awesome, however;
Beergantuan is the world’s biggest beer bong.
As this link clearly shows.
http://www.youtube.com/watch?v=43SBvg20lOI