'Brewtroleum' - DB Export/Heineken - New Zealand

DB Export, a brewery in New Zealand, created a biofuel using leftover yeast from brewing beer called "Brewtroleum".

D8 invited its consumers to help save the world by drinking their beer and creating an environmentally-friendly biofuel that can be used in most engines that run on petrol.

300,000 litres of Brewtroleum were produced and 8.6 million beers were sold - increasing sales by 10%.

DB Export also became New Zealand's fastest selling beer brand.