Q says valid only at Walgreens, YMMV using it elsewhere.
BOGO 20oz Coke by entering 100869373819 for a code at
MyCokerewards.com
3/29 - 4/4 Walgreens has a deal where you buy a 20oz Coke and you get a free candy bar, so with this Q you'll get 2 free candy bars with your free Coke when you buy one.
3/29-4/4 Flyer
You can also request the coupon to be mailed thru this
Link