AppAdvice has teamed up with CafePress in order to offer you a chance to win a $25 gift certificate for a custom iPhone case.

There are lots of iPhone cases in existence, and some are certainly unique, such as the CM4 Q Card Case and G-Form X-Protect. However, what could be more personal and awesome than a case designed by you, for you?

Providing “the world’s largest selection of artist-designed t-shirts, clothing, accessories, housewares and gifts,” CafePress makes it easy to transform a standard, slider, or snap case for an iPhone 4, 4S, or 5 into a masterpiece. The image can be as simple as a team logo or flourish into a beautiful fantasy world of unicorns, rainbows, and more. The straightforward online design studio at CafePress includes dozens of fonts, text colors, shape choices, and even a reasonably large selection of clipart. In addition, every object can be moved, rotated, resized, and layered.

To have a chance at winning one of 10 certificates, leave a comment below telling us one idea for a custom case image before Nov. 28 at 11:59 p.m. PST. Only one entry per person is allowed, and limited to residents of the United States and Canada. In the meantime, feel free to do a little practice designing. Please be sure to also check your junk email boxes after the giveaway concludes.