Amazon has the 12-pack Propel by Gatorade Zero Calorie Sports Drinking Water with Electrolytes and Vitamins C & E, 16.9 fl. oz. Bottles (Watermelon, Grape or Kiwi Strawberry) for $6.38 - 5% off with Subscribe & Save (can cancel at any time) = $6.06 with free shipping on $25+ or with Prime. Black Cherry is $6.38 (no S&S available).
$6.06 retail: $12Report