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.o Includes Easy Fill Technologyo Improved Fill Cup Helps Reduce Spillso Perfect for All Cold Weather Activitieso Flameless Gentle Warmtho Rugged & Durable Metal Constructiono Lighter Fluid Refillable – Environmentally Friendly & Reusable Lasts for up to 12 hours•Two-year guarantee•Fill with Zippo premium lighter fluid•Handwarmer replacement burners sold separately