Jesse always has a barrel of cider open. He says it keeps him young. I don't argue with him. It wouldn't do any good anyway. Even Mama knew that.
When we were kids, he'd pour me and Hanover a thimble full when Mama wasn't looking. She always wondered why we got so sleepy on the boat ride home. She always brought a few jugs home for herself. One of those jugs was reserved for making apple cider vinegar. After Jesse moved away, we'd go out to pick apples and Mama tried her hand at brewing hard cider. It wasn't like Jesse's, but it was good enough for making vinegar.
I keep mine in the drying shed while it cures. I also filter it. But before I do, I put aside a bit that contains the mother of vinegar so I'll have a starter for the next batch. It takes a couple months for hard cider to turn to vinegar, so I usually have a few batches at different stages in the process. If you're curious about how to make apple cider vinegar, you can find more information here.
Apple cider vinegar is good for a lot of things. It helps improve digestion and can even lower blood sugar. Mary O'Malley keeps some on hand to ease sunburn. Being red-headed and Irish, the sun is lethal to her. Hanover, however, prefers his apple cider hard. If you want to learn more about the health benefits of apple cider vinegar, here's a link to apple cider vinegar on WebMD.