Chitek offers Amazon Prime members the Acase Superleggera PRO Dual Layer Case for Apple iPhone 4 and 4S in Blue for $12.95. Coupon code "I5CCBM3G" cuts it to $5.95. With free shipping, that's a $7 overnight drop, tied with our mention of it in white from yesterday, and the lowest total price we could find for this case. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.14.) It fits the iPhone 4 / 4S for AT&T, Verizon, and Sprint. Deal ends November 24.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that currently there's a waitlist for Amazon Mom.)