For Prime members only, Amazon offers the Perrier Sparkling Natural Mineral Water 8.45-oz. Can 30-Pack in Pink Grapefruit for $11.97. Order via Subscribe & Save to cut the price to $11.37 with free shipping. That's $3 under our February mention of another flavor and the lowest price we've seen. (It's now about $7 under what you'd pay in local stores for any flavor.)

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Be sure to cancel your subscription after your order arrives to avoid being charged for subsequent shipments.