Hard Candy Cases is running a special that ends tonight (3/5/12) at 11:59PST. If you purchase the new Bubble Shell Case for your Kindle Fire, you’ll receive a code to purchase a Bubble Shell Case for your iPhone 4S for only $10. Bubble Shell cases have a soft-touch texture but offer the protection of a rigid polycarbonate body. Both cases will ship March 18; the Kindle Fire case sells for $39.95 and the iPhone 4S case normally sells for $39.95, but you can get it for $10 if you act now. You’ll receive the code for the iPhone 4S case after the promotion ends.