Then Jesus told them this story about grapes that people crushed so they could drink the wine. They poured grape juice into skin bottles and filled the skin with juice and left it so that they could drink the wine later on. The juice stayed in the skin until it swelled. That's why they poured new juice into strong new skins. Then when the juice swelled, the skin swelled too. So Jesus said, “We don't pour new juice into old skins that have already swelled. If we do that, when the juice swells the skin will burst and the juice will spill out on to the ground.