See what's inside your pen case with just a quick glance! These cute cylindrical pen cases feature a large, clear window on the front to let you see inside. They're easy to use and can store lots of pens, pencils, and even decorative masking tapes! They come in a variety of fun colors with a contrasting zipper. The zipper is shaped like a key ring hoop for you to hook charms or other decorations and show off your personal style. The cases are also printed with an encouraging message: "Writing, drawing...a pen is all you need to deliver messages." Indeed!