Kelvin Natural Slush hits the streets, serving sophisticated slushies.

Certain things seem less acceptable when you become an adult--midday naps, we're talking to you. But now, a favorite childhood treat, the slushie, has received an adult-approved makeover thanks to the Kelvin Slush truck.

The sophisticated, all-natural slushies come in three flavors, Spicy Ginger, Tangy Citrus and Green and Black Tea. The founder, ex-lawyer Alex Rein (pictured) wanted the icy drinks to be "a little more grown up and a little less sweet."

Customize with a scoop of fresh fruit purée or ice cream, and drink up without worrying about the dreaded neon-colored tongue syndrome. We're even told that the slushies make great mixers.

Brain freeze just got a little more fun.

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