If you do not have enough money for an iPhone/iPod case, consider [Case-Mate iPhone 3G/3GS Recession Case](http://www.case-mate.com/iPhone-3G-Cases/Case-Mate-iPhone-3G–3GS-recession-case.asp) at $0.99 each. It is a legit cardboard case. You can even buy the “BAILOUT BUNDLE” with 10 cases for $7.99.
The case is not waterproof, flammable if you light on it, and comes with animation instruction on how to assemble it. You can order the “Sharpie Script” customization at the back of your case when you order. In case you are wondering, shipping is free.