Vintage Soda is a term used to describe a type of soda that has been around for many years. The most popular vintage soda is NEHI, which stands for 'Never Enough High-Fructose Indulgence'. It was first produced in 1924 and has since become a classic American beverage. NEHI is known for its unique flavor and is available in a variety of flavors, including grape, orange, peach, and strawberry.