Of note, Amazon offers the Era 2x Ultra High Efficiency Liquid Laundry Detergent 50-oz. Bottle 2-Pack for $7.04 via a 50-cent off coupon (on the product page) and Subscribe & Save. (You can cancel Subscribe & Save after your order ships.) With free shipping, that's $3.52 per bottle and the best price we could find for two bottles by $3. Each bottle provides up to 32 loads of wash.