FlexShell Dot for iPod Touch Gen 4 by Marware is a soft, translucent TPU shell that lets you arrange the pattern of colorful dots in any way you like. Inside the translucent TPU shell, there are dimples in the shape of polka dots where you can place colorful dots in any pattern you want. The bag full of dots that comes with the shell allows you to have a lot of fun designing your iPod Touch. The iPod Touch translucent shell even looks great without any color dots.
Sources: Marware, Amazon.com