I was driving through LaPlace the other day, and I saw that they still had a Frostop restaurant, so I stopped in for a frosty mug of root beer. Here are some pictures. I took some of them, and the rest came from their website.
Click on the images to make them larger.
Frostop Drive Ins were a popular fast food stop a few years back. There were Frostops in Mandeville, Slidell, Bogalusa and Bay Saint Louis, MS. It featured "Lot-O-Burgers" , "ButterBurgers" and root beer in a frosted mug.
According to Wikipedia, the first Frostop root beer stand was opened in 1926 in Springfield, Ohio by L.S. Harvey. A chain of franchise locations was established, with the biggest growth following World War II. The Frostop drive-ins reached their peak in 1958 with locations concentrated mostly in the American midwest and deep south, but found from New York and Florida to California and Washington state.
See also this link: