It qualifies for the Buy 2, Get $5 off Back to School promotion. Add 6 12-packs to your cart (72 bottles total) and the total looks like this:
Items (6): $35.88
Shipping & handling: $0.00
BTS Savings: -$15.00
Total before tax: $20.88
Estimated tax to be collected: $0.00
Estimated Regulatory Fees: $0.30
You could buy fewer than 6 if you have other Amazon items to buy to put your total over $25.
You can also choose different flavors for only slightly more money.