I have material that is 13 years old. I have some green that I put in a dinosaur quilt for my grandson, and I use a small piece of it in every scrap quilt I make. He is 15 now and still asks me where his part of each quilt is, and always looks to find his green. :lol: :lol: I still have about 1/2 a yard of it, and I do use it sparingly. I also have some bow tie squares that were hand made by my grandmother , from feed sacks, and they are at least 50 years old.