Nope, not smoke, it's vapor!"
Are you allowed to  vape at work?  If you can, good for you! That's great that your employer is smart enough to realize that he/she's saving time and money by allowing you to use your ecig. If you're not as fortunate, I hope that you'll be able to change your employer's mind after giving him/her some info. Depending on your style, you can choose to send this letter to your company's decision makers, or use it as a starting point for conversation. Whatever you do, please be respectful while showing your passion for vaping! Of course, if your workplace does not have an official stance on ecigs, but your nearby co-workers are cool with you vaping, then there's no need to draw attention to it. Dear Employer,   Please let me use my electronic cigarette at work. It is very different from a real cigarette. My e-cigarette does not smoke or smell, and is barely noticeable when I use it. E-cigarettes don't burn tobacco. They contain e-liquid made of a just a few ingredients: propylene glycol, vegetable glycerin, food-grade flavoring, and nicotine. The battery heats up the e-liquid to make water vapor. This vapor looks like smoke, but it's not. E-cigarettes have not been shown to cause harm to bystanders. In fact, all evidence to date shows that the low health risks associated with ecigs is comparable to other smokeless nicotine products. A  comprehensive review  by a Drexel University  professor  based on over 9,000 observations of e-cigarette liquid and vapor found "no apparent concern" for bystanders exposed to ecig vapor, even under "worst case" assumptions about exposure. By letting me use my e-cigarette inside, I am saving time by not walking outside to smoke. Sincerely,   ________________ If you want some more materials to help back you up, check out CASAA's (the Consumer Advocates for Smoke-free Alternatives Association) Research Library on their website. Let us know, have you talked with your employer about vaping at work? How'd it go? What was the outcome? Tell us in the comment section below.