Amazon is offering Buy 3 Get $5 Off on select Personal Care Products. Shipping is free w/ Prime or on orders of $25 or more.
Note you can mix and match products but you need a quantity of 3 to get the multibuy discount at checkout.
Example Deal
1L Listerine Antiseptic Mouthwash (Cool Mint) 3 for $10.30
Note change the quantity to 3 and check out via Subscribe & Save