For Prime members only, Amazon offers the Vita Coco Coconut Water 11.1-oz. Bottle 12-Pack in Pure for $9.99. Order via Subscribe & Save to cut the price to $9.49 and bag free shipping. That's around a buck under our mention from four days ago and about $2 less than you could expect to pay in local warehouse club stores.
Note: Be sure to cancel Subscribe & Save after your item ships to avoid being billed for future shipments.