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After making wines, chateaus will conserve the alcohol into huge oak barrels or metallic barrels in order to distribute their wine to all over the world. Using oak as vessel is the best way to keep wine staying in high quality. However, this action will lead more and more oak being cut down, furthermore lead the global warm. Most of time, people buy the glass bottle wine, that is after refilling from barrels by dealers. Chateaus will send those barrels to dealers by car, train, ship or plane depending on different factors. Then dealers will dispense wine into glass bottles for sale.
Take United States as an example. After repealing the Prohibition, the Three-tier System existed for distributing alcohol beverages. “The basic structure of the system is that producers can sell their products only to wholesale distributors who then sell to retailers, and only retailers may sell to consumers. Producers include brewers, wine makers, distillers and importers.”
Reference: “Three-tier (alcohol Distribution).” Wikipedia. Wikimedia Foundation, n.d. Web. 28 Apr. 2015.