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. The coupon is valid through July 31. No printed coupons will be accepted. You must show the coupon on a 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.