Demijohns were once used all over Europe to store wine or oil in large quantities. The owner would take his empty demijohn to the local cooperative and fill it with the latest wine. To provide a seal from the air they would add a layer of oil at the top, then siphon the wine from below the oil. The inside of the glass can be washed.This large green demijohn (also called carboy) is marked 3 on the bottom. It is 26 inches high and 18 inches wide at its widest point. The item "VINTAGE LARGE GREEN GLASS DEMIJOHN CARBOY WINE FLASK HUGE" is in sale since Sunday, December 15, 2019. This item is in the category "Collectibles\Bottles & Insulators\Bottles\Modern (1900-Now)\Wine". The seller is "anna-rocks" and is located in Grand Marais, Minnesota. This item can be shipped to United States.