Through April 16th, 7-Eleven is offering Buy 1 Get 1 FREE Slurpee Drinks — any size! Even better, if you take advantage of their 7Rewards app, both Slurpee drinks redeemed for this promotion will count towards the “Any 7th Cup is FREE” deal! Note that it appears that many 7-Eleven locations are not aware of this promotion, but you can show the clerk this Facebook post if you need to. No coupon needed. Valid at participating locations only.