We love any chance to save money at the movie concession stand, given the expense of tickets. This month, you can get $3 off a soft drink at Regal Cinemas — access the mobile coupon here. You can use the coupon once per day through March 31. No printed coupons will be accepted. You must show the coupon on your mobile device to get the discount. With the coupon, at most locations, a small soft drink is $2, a medium is $2.50 and a large is $3. For big drinkers, the best value is the large because it comes with a FREE refill.