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Now owned by the Dr Pepper Snapple Group, Vernors was first made in the late 1800s. According to company history, it was invented in 1866, though Serious Eats notes its 1911 trademark application says it first entered the market 1880. Either way, that's pretty old -- older than Coca-Cola or Dr Pepper.
Last week, 7-Eleven announced Vernors is their first regional Slurpee launch, selling the Vernors Slurpees in all Michigan 7-Elevens. Without the intense carbonation, it doesn't have the same kick as a regular Vernors, but devotees still cannot get over their excitement.