(UPI) -- White wine stored in plastic bottles or boxes loses its flavor in six months but remains stable in glass bottles, a study found.The chemical composition that gives white wine its flavor changes within six months of being put in plastic bottles or plastic-lined boxes, Britain's Daily Mail reported Friday.Researchers at the Institute of Vine and Wine Sciences in Bordeaux, France, discovered alcohol oxidization in that time period if the wine is packed in single and multi-layer polyethylene terephthalate (PET) bottles or a bag-in-box configuration, the newspaper said.