National Coffee Day is on September 29, and coffee consumption in the U.S. is at a 20-year high. Starbucks is offering a special deal on Amazon where customers can get $10 off when they spend $50 on select coffee blends. Additionally, Starbucks is hosting a free Twitch live event with music duo Sofi Tukker on National Coffee Day. Other coffee chains like Dunkin' Donuts, Keurig, PJ's Coffee, and Whataburger are also celebrating the holiday with special promotions. Click here for a full list of deals happening