As one of its daily deals, 13Deals offers the Thermos Batman The Dark Knight Rises Bat Signal Lunch Bag for $6.99. Coupon code "BATMANLUNCH" cuts it to $5.49. With free shipping, that's tied with our mention from a week ago and the lowest total price we could find by $4. This insulated bag measures 9.5" in diameter and 3.5" deep. Deal ends today.