On a recent Friday evening, two New York City gentlemen in their 20s were sitting at Vol de Nuit, a Belgian beer bar in the West Village. After some conversation, they removed a couple of small, tea-bag-like packets stuffed with tobacco out of a circular black plastic container the size of a hockey puck and, between sips of Pilsner, placed them inside their respective upper lips. First came the burning sensation, followed by a slightly unpleasant taste, and then, the nicotine buzz. “It combines the cleanliness of not smoking with the pleasure of tobacco,” said one of the men, who wished only to be identified by his first name, Lucas, of the substance, a product imported from Sweden called ... [Read more]