Perfect for all cold weather activitiesZippo Refillable Hand Warmers Features: Sleek, Thin Design Fits into the smallest pockets for any events. Rugged & Durable Metal construct to stand up to the toughest conditions. Stays Warm For Hours Perfect for those long cold hunting trips and other outdoor activities. Easy to use: Flame-less Heat Our Refillable Hand Warmers provide safe, gentle warmth with our catalytic burner. Always remember to remove the burner before filling with lighter fluid. Easy Fill Technology Included with the Hand Warmer is our improved fill cup which helps reduce spills. Fill this up with your Hand Warmer Fuel or Lighter Fluid then carefully and slowly pour the contents of the filling cup into the filling hole on the Hand Warmer body while maintaining the Hand Warmer in an upright position. Warms Quickly Once you have filled the Hand Warmer with lighter fluid place the burner back on and apply a flame to it. Put the Hand Warmer top back on, slip into your warming pouch, and enjoy the heat!The Hand Warmer will continually provide heat for 6 - 12 hours once turned on. If necessary, place hand warmer in the pouch and place on a fireproof surface until the fuel is exhausted. Refillable & Reusable Fill with Zippo premium hand warmer fluid. He