Although they don't have any special design, it's transparent feature allow you able to see through the lens case and know what lens is stored inside. It's very useful especially when you have many different circle lens or cosmetic lens. It helps you organize your lens in proper manner.

Besides, it can be very helpful when you clean your other contact lens case (eg. your animal design lens case). As you do the cleaning job on other lens case, you can temporary store the lens in this transparent contact lens case!!