This item has been stored at my parents' house for many years. It was kept on a shelf, but it was dirty, so I washed it. It's mostly clean now, but upon closer inspection, the bottom of the cup still has some uneven cloudiness, like the remnants of a sticker. I believe it was unused, as this type of cup wasn't used in my family. When I look at the stamp on the bottom of the cup with a magnifying glass, it says: DURALEX made in france 19 The letters are round and difficult to read.