Right now new TopCashback members can enjoy FREE Gain Flings Laundry Detergent from TopCashback! Purchase your Gain Flings from Walmart.com for $11.99 and your $12 TopCashBack rebate will post to your account within 14 days. Here's how to score your free detergent: Register or login at TopCashback. Click on the pink "Get Offer Now" Button. [...]