Walmart offers the Meguiar's Ultimate Waterless Wash & Wax 26-oz. Bottle for $7.42. Opt for in-store pickup to dodge the $5.99 shipping charge. (Amazon charges the same via Subscribe & Save.) That's a buck under our mention from a week ago and the lowest price we could find by $6. One bottle will wash and wax three to five average cars.

Update: The price has increased at Walmart; however, Amazon still offers it for $7.42 with free shipping via Subscribe & Save.