I do it all the time. It's great to have matching pillowcases but I also use one as the gift bag whan I give a quilt away (I refuse to waste money on wrapping paper). The other great thing about a matching pillowcase is when you store them, you can see immediately what quilt is on the shelf just be glancing at the pillowcase because I use the matching pillowcase as the storage bag for my quilt. No dumping out cloth bags just to see what quilt is in there. Matching pillowcases also mean that you have material to patch your quilt if a repair is ever necessary.