You could use these tops for anything pourable. I buy 'coarse ground black pepper' from an Indian market down by Detroit and it comes in a resealable plastic bag. I buy a pound at a time so storing in a glass jar with a spout would make filling the pepper shaker a lot easier. Sneeze sneeze.
A real crafty person could also cover the cardboard top with vinyl shelf paper or glue a pretty wrapping paper or scrapbook paper to the top and reinsert the spout. Endless possibilities. I can see that I will be making more of these in the future.