Thanks to Susan S. for letting me know about this! Monday, September 29, 2014 is National Coffee Day, and all Quik Trip locations will be giving a free, any size cup of self serve coffee to customers.
The promotion was announced on the Quik Trip Facebook page. According to comments by QT on Facebook, customers are welcome to one any size cup of its self serve coffee all day on Monday, September 29, 2014.
Quik Trip joins McDonalds, Krispy Kreme, and Presto convenience stores in Wichita in offering free coffee for National Coffee Day, although not all of them are running the promotion all day. See all the National Coffee Day free coffee offers here.