We spotted an unadvertised sale and Extrabucks promotion at CVS. This week, purchase one 3.5-ounce tube of Colgate Optic White Toothpaste, on sale for $3.99. Receive $2.50 Extrabucks at checkout. Use one $0.75/1 printable coupon from the Colgate website to pay only $0.74! The Extrabucks promotion has a limit of two, so you can do this deal twice.