Get your caffeine this weekend at either discount or for free!

Sunday is National Coffee Day!

Many of the national chains are offering a free coffee with purchase of a sandwich or other items.

According to USAToday:

Dunkin’Buy a hot coffee and get a second cup of equal or greater value for free Sunday.

Tim Hortons: On Saturday and Sunday, place an order through the chain’s mobile app and get a free reward that can be redeemed for coffee, eligible beverages and baked goods. Download the app at www.timhortons.com.

Starbucksthrough Sunday, U.S. stores will have Siren's Blend coffee. Starbucks says that for every cup of the medium roast sold, 15 cents will be distributed between International Women’s Coffee Alliance and Days for Girls, two organizations that support empowering women and girls.