 In Banyuls , <unk> use various methods to " <unk> " their wines to encourage deep <unk> colors . Some <unk> utilize a <unk> system of transporting the wine among different size barrels of various ages that are left out in the sun to warm . Others will put the wine in large glass <unk> to expose it to direct sunlight . In addition to the dark color , the resulting wines often have a <unk> , rancid taste called <unk> . In the Banyuls Grand <unk> AOC the wine is required to be aged in wood barrels for two and a half years . 
