Rebate form can be downloaded from here
Current best price for Nestle purified water is at Walmart. $3 for 20-pack (15 cents a bottle).
Buy 3 get 1 coupon, buy 5 get 2 coupons from Nestle.
You best net cost is $15 for 148 bottles (5×20 plus 2×24 bottles with coupons later) or 10.1 cents a bottle plus applicable deposits