Smartwater 6-Pack, as Low as $3.98 on Amazon

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I found stackable coupons on the 6-pack of Smartwater from Amazon. There's a $0.29 off coupon hiding under one-time purchase. You also get to clip a 25% off coupon when you up into Subscribe & Save. You need five active subscription items delivered to the same address to get the 15% discount. Pay as low as $3.98.