The tasty treat — that packs a 40-proof punch — was the brainchild of a little after-hours mixology created when Tracy Reinhardt spiked kid-favorite chocolate milk with vodka one night after her kids had gone to bed. Now, Reinhardt and her business partner Nikki Halbur, sell their product in Minnesota, California and Arizona with the slogan, “Re-taste your youth. At 40 proof.” They plan to introduce new flavors — including adult orange cream, adult fruit punch and adult limeade — soon.