Hurry to the store to take advantage of this new offer from Arm & Hammer. Get one free Arm & Hammer liquid laundry detergent, up to $5.00, with the purchase of two Arm & Hammer baking soda products and one liquid laundry detergent, via mail-in refund. This offer is valid through 2/15/14. Submissions with original purchase receipt and complete name, address and zip code must be mailed and received by 3/15/14. Allow six to eight weeks for processing.