FREE 16oz cup of Wawa Coffee - On National Coffee Day, September 29th, you can get a FREE 16oz cup of Wawa coffee. Simply pop over and fill out the form then look for an email titled "Celebrate National Coffee Day...on us!" to arrive in your inbox in less than 5 minutes. Print your coupon then bring it to any Wawa store to redeem for your free coffee on 9/29/2013.