Bypass bathtub doors are typically sliding doors that allow for easy access to the bathtub. The doors are typically made of glass, metal, or a combination of both and can be installed in a variety of ways. Some bypass bathtub doors slide on a track that is mounted to the wall, while others are mounted directly to the bathtub itself. They are an ideal solution for those who want to maximize their bathroom space, as they do not require any additional space for opening or closing.