Amazon has the 2-Pack of TheraBreath Healthy Gums Periodontist Formulated 24-Hour Oral Rinse (16oz each) for $12.49 - 5% off with Subscribe & Save (can cancel anytime) = $11.87 with free shipping on $25+ or with Prime. 

• Roughly $5.93 per bottle vs. $8.99 at Walgreens / CVS