You could use an ordinary coffee cup, but why would you? Looking into the real Chez Peachy, we see that she is still using the awesome Muppet mugs her grandmother bought, and we really love Miss Piggy. Miss Piggy is a big help as she holds a lot of coffee and is good at getting refilled too...you cannot buy these anymore-we looked for you-but if you still have yours from the 1980's take good care of them and enjoy them!