There's a right way to carry your vape when it's cold out. Inside a jacket pocket, close to your body, is usually best—your body heat keeps it at a reasonable temperature. Avoid leaving it in a backpack that sits in the car trunk, where it can get much colder. When you go from outside to a warm building, let the vape sit in your pocket for a minute before you use it. And if you're flying, remember that e-liquid is subject to TSA rules—keep it in your carry-on and be ready to show it's under the liquid limit. Cold weather is manageable; it just takes a little planning.