Amazon has the 12-Pack Fast Twitch Energy Drink from Gatorade (12oz Bottles, Glacier Freeze or Tropical Mango) on sale for $16 - 10% off (check “Save an extra” box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $14 with free shipping on $35+ or with Prime. 

Also available in Grape or Strawberry Lemonade Variety Pack flavors for $15.