Griffin Technology offers a selection of Griffin Threadless Cases for Apple iPhone or iPod touch for $9.99 plus $3.50 for shipping. Each is $20 off and at the lowest total price we've seen since March, when they were a buck less (since expired). Choose from cases for the iPhone 4 / 4S, iPhone 3G / 3GS, or iPod touch.

A best bet is the Griffin Threadless When Pandas Attack Case for Apple iPhone 4 / 4S (pictured) for $9.99 plus $3.50 for shipping. That's $20 off list and the lowest total price we could find. This snap-on shell case adds less than 1mm in total thickness.