Those smack pack hand warmers are great until they run out and you have to toss them in the trash. The Smart Warmer 3-in-1 is a rechargeable little device that you can toss in your pocket to keep your hands sufficiently heated all winter long. The warmer heats up to 106 degrees in less than five minutes and can be recharged over 500 times. The tiny aluminum tool also can charge your iPhone and serve as a flashlight when need be. It’s the perfect winter addition to your collection of everyday carry gear.