When you're outdoors, you're focused. Whether hunting, fishing, camping, or simply enjoying ice time with your buds, you don't want distractions like cold hands. Zippo's new and improved filling process for its hand warmers keeps you in the game! Fill the cup. Light the burner. Done! Up to 12 hours of heat for your hands and fingers. Now get back out there. Includes Easy Fill Technology Improved Fill Cup Helps Reduce Spills Perfect For All Cold Weather Activities Flameless Gentle Warmth Rugged & Durable Metal Construction Lighter Fluid Refillable - Environmentally Friendly & Reusable Refillable Hand Warmer Replacement Burner is available.