Slide this into your pocket and enjoy the outdoors even when it’s cold! Zippo’s Hand Warmer has a thin design that easily fit into pockets. It’s virtually odorless and stays warm for up to 12 hours. The Zippo Hand Warmer is perfect for sporting events, hunting, winter sports and sleigh rides too! Fill with Zippo Premium Lighter Fluid. Provides up to 12 hours of warmth.