Prime Members: 1-Liter Happy Belly Sparkling Water (Seltzer, Diet Tonic or Tonic) $0.70 each w/ Subscribe & Save + Free S/H

Amazon has 33.8-Oz Happy Belly Seltzer Sparkling Water for $0.76 - 5% when you check out via Subscribe & Save = $0.72. Shipping is free with Prime or on $35+ orders.