Complex sentence: The Darwin Stubby seems to be the beer bottle of choice for this festival, and it reigns as the largest "stubby" of beer in the world at 75 ounces, or roughly 2.1 litres.
Split into simpler sentences: The Darwin Stubby seems to be the beer bottle of choice for this festival. This bottle reigns as the largest "stubby" of beer in the world at 75 ounces, or roughly 2.1 litres.