Amazon has the 1-Liter (33.8 fl. oz.) Listerine Antiseptic Mouthwash (Cool Mint or Fresh Burst) for $5. Add three to cart to reach $15 - $5 off at checkout - 5% off with Subscribe & Save (can cancel at any time) = $10 with free shipping on $25 or with Prime.
$10 retail: $16Report