Meritline offers the Trident Cyclops Case for iPhone 4 / 4S in Yellow for $9.99. Coupon code "MLC321CN" cuts it to $5.99. With free shipping, that's the lowest total price we could find in any color by $4. It features impact-resistant polycarbonate construction, a shock-absorbing silicone outer ring, and more. Coupon expires after 500 uses.