Decanting Wine
My mother has three decanters that I know of. One is part of a sherry set, and my parents did sometimes use the set to serve sherry and port, and on at least one occasion the port truly did need to be decanted. The other two are wine decanters, and I don't remember ever seeing them used. One of them my mother bought and used fairly frequently when she was living in Germany, and drinking German and Italian wines. She was quite clear about the reasons she used it, when I asked her; some wines had sediment in them, sediment that could be seen when you held the bottle just right. And some, particularly red wines, just needed "a little air," as she put it, to taste right. Plus, they looked pretty.