Walgreens has for MyWalgreens members (free to join): select 37-Oz Tide Liquid Laundry Detergent on sale for $5.49 - $1.55 off when you 'clip' the coupon from the product page - 10% off with promo code WAG10 = $3.55. Select free store pickup where available on orders over $10+.
Available (prices after coupon & promo code):
Available (prices after coupon & promo code):