Some people out there have a bit of a problem with having butterfingers. It seems like every time you turn around, you have dropped and broken something. If that something happens to be your iPhone more often than not, things can get to be a little expensive rather quickly.
If you happen to be one of these unfortunate folks, you may want to look at the iPhone Uguard Resin. This is meant to stick to the back and sides of your iPhone 4/4s to provide a much better grip between you and your beloved mobile device. While this isn’t exactly a “case” per se, it is meant to be used in place of one, and will protect against minimal scratches. This resin can also hold up your phone to glass surfaces like gecko feet, but be wary that it is only capable of doing so for a short while. If you’re interested in taking this home, be prepared to spend about $20.