Thumb Score: +14

Amazon [amazon.com] has 1L Listerine Total Care Anticavity Fluoride Mouthwash (Intense Mint) for $8.98 – $1.78 – 25% when you ‘clip’ coupons on product page – 5% when you check out via Subscribe & Save = $4.50.
Shipping is free with Prime or on $35+ orders.

Savings
Coupon price $7.20 (clip on the product page)
Extra 25% on the first order. (check and activate [amazon.com])