For Prime members only, Amazon offers the Perrier Pink Grapefruit Sparkling Natural Mineral Water 16.9-oz. Bottle 24-Pack for $13.22. Check out via Subscribe & Save to cut it to $12.56 and bag free shipping. That's tied with our mention from a month ago and about a buck under the price you'd expect to pay at your local store.
Note: Be sure to cancel your subscription after receiving your item to avoid being billed for subsequent shipments.