Amazon offers the Ito En Oi Ocha Green Tea 16.9-oz. Bottle 12-Pack for $10.49 with free shipping, via the directions below. That's $0.87/bottle and about $10 under what you could expect to pay in local stores for this quantity, although we saw it for a buck less in May. To get this price:

1. View the Ito En Oi Ocha Green Tea 16.9-oz. Bottle 12-Pack for $14.99
2. clip the 25% off coupon on the item page
3. checkout via Subscribe & Save for a final price of $10.49

Note: Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.