Amazon has 4.2-Oz Colgate Optic White Stain Fighter Whitening Toothpaste (Clean Mint Flavor) on sale for $3.49 – $1.40 when you ‘clip’ the coupon on product page – 5% when you check out via Subscribe & Save – Extra .70c Discount automatically applied at checkout = $1.22. Shipping is free w/ Prime or on $35+.