Uber Eats has teamed up with White Castle to give away a million sliders! You can get 10 Original Sliders for FREE through the Uber Eats app when you use promo code 1MILLIONSLIDERS! A $2 small order fee will apply to orders under $10. After fees (small order, service, and delivery fee), you’ll pay just $5.50 (plus tip) for 10 sliders delivered to you. Enjoy!