ZooGue offers its ZooGue Social Shell Case for Apple iPhone 4S
in 13 colors for $14.99. Coupon code "FreeZooGueAccessory" makes it free
. With $3.99
for shipping, that's tied with our February mention and the lowest total price we could find now by $13. Coupon expires after 50,000 uses.
Update: Of note, you can buy two of these cases for $29.98 before coupon, free after. With $5.99 for shipping, that's $3/case and the best per-unit price we've seen.