Apparently a normal iPhone case can deal with some common shocks and scratches. But for klutzes and butterfingers, iBand iPhone case should be more suitable.
The iBand iPhone case is made out of d30, a non-Newtonian fluid. After stressed, the squishy material can turn rock solid. So it means the iPhone case constructed of stressed d30 is able to distribute the force of the impact and bear extreme shocks. The video of iBand case has been posted at the end of the article, you can check the actual result.
iBand iPhone case is priced at $29.99 USD. If you need more stronger protection for your iPhone, jump to ThinkGeek for more details of the iPhone case.