Amazon has the 12-Pack Essentia Ionized Alkaline Bottled Water (12oz Bottles) on sale for $11.53 - 25% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $8.67 with free shipping on $35+ or with Prime. About 6 cents per ounce.

• Also cheaper per ounce: The 12-Pack, 1L Bottles is $18 (4.4 cents per ounce)
• If in stock in your area, Sam's Club has the 1.5L 12-pack for $17 (but closer to $26 with shipping if not).