Save big on holiday M&M’s this week at CVS with a coupon stack! (What is a coupon stack?) At CVS, you can use one manufacturer coupon and one CVS store coupon per purchase or item. Use a printable or insert manufacturer coupon from the list below and a printable CVS coupon to pay $4.00 for two bags of holiday M&M’s. Then get back $1.00 in Extrabucks rewards after your purchase.