Enjoy your favorite hot beverage with this vintage White Castle System blue coffee mug. Featuring the iconic "Good Coffee Buy Them By The Sack" slogan, this mug is perfect for collectors and fans of the classic fast-food chain. Made from high-quality materials, it is durable and designed for everyday use. Its unique blue color and classic design make it a great addition to any kitchen or office. Whether you're a coffee lover or a fan of the White Castle brand, this mug is a must-have. Super fast shipping and free returns!