For the Florida folks, Pinch-a-Penny has a coupon on their site that is good over the memorial day weekend for Buy One Get One Free for the 2.5 jug refills. That works out to 640 oz for about 5.65 or $0.084 an oz.
Note this is only for the refill (the jugs are an additional cost if you don't have them already).
Note this is only for the refill (the jugs are an additional cost if you don't have them already).