Amazon.com has 6-Count Colgate Extra Clean Full Head Toothbrushes (Medium) on sale for $3.33 after clipping 20% off coupon and checking out via Subscribe & Save (click on “change” next to “First Delivery On” and select get it with your next Subscribe & Save delivery). Shipping is free
Note: You must be logged in to your Amazon account to clip the coupon. Coupons are typically one use per account. You may cancel your Subscribe & Save subscription any time after your order ships.