Amazon has 24-Pack 11.15oz San Pellegrino Essenza Mineral Water (Lemon & Lemon Zest) for $8.18 when you checkout via Subscribe & Save. Shipping is free.
Note, you may cancel Subscribe & Save anytime after your order ships. Select the later date from the "First Delivery On" menu to get traditional S&S checkout instead of adding to your cart.
Also available (w/ S&S):
24-Pack 11.15oz San Pellegrino Momenti (Clementine & Peach) $9.26- 24-Pack 11.15oz San Pellegrino Momenti (Lemon & Red Raspberry) $9.26