The pumpkin spice latte from Starbucks has a cult-like following every fall. However, its recipe includes artificial flavors. A latte from Libby’s Pumpkin does not. The dialogue was simple. “Can’t make it to the coffee shop? Whip up our 100 percent pure pumpkin latte instead.” Nestlé’s most successful social post, worldwide, the week it was posted. Liked 23K times on Facebook.