Aging wine and liquor is nothing new, but China may have discovered the world's oldest drink.Archaeologists have unearthed a bronze kettle in northwest China's Shaanxi province that dates back more than 2,000 years. In it was about 300 milliliters of white, muddy liquor.Archaeologists said it's similar to yellow rice wine consumed in China. The kettle is a sacrificial vessel dating back to between 221-207 B.C. and was unearthed from a graveyard from the Qin dynasty.