Twig's Beverage still sells its core soft drink, Sun Drop, in returnable glass bottles [Twig's] In the US alone, 127 billion plastic bottles are purchased every year, according to one estimate.

The craze has also been spotlighted on Hulu’s “The Secret Lives of Mormon Wives,” where cast members have showcased their go-to orders.

The red roof catches your eye from the street. Classic car paintings on the walls tell you what’s coming next. This isn’t just breakfast and lunch. This is a trip back to when diners meant something ...