If you didn't already use the coupons and do this deal last week, it's back again now until March 30. Get the big Gain laundry detergent for $9.99, originally $12.99. An in-store purchase earns you a $5 Register Reward when you buy two. Opt for the 88-ounce bottle and 31-count Flings pack, and use two $3 coupons from the Walgreens app.

For more tips on couponing at Walgreens and saving on laundry detergent, see these guides.

Store sales and promotions can vary by region. Before shopping, check your local ad to confirm that this deal is available in your area.

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