Zippo&';s new and improved filling process makes firing up these little pocket-sized furnaces easier than ever. Fill the cup...Light the burner... And go! They provide up to 6 hours of gentle, consistent heat. And they&';re odorless. So the only thing that stinks is not using them and getting frozen fingers. Includes Easy Fill Technology Stands Up With Flat Bottom For Easier Filling Improved Fill Cup Helps Reduce Spills Perfect For All Cold Weather Activities Flameless Gentle Warmth Rugged & Durable Metal Construction Dimensions: 2.9"H x 2"W x .6"D 2-year warranty Lighter Fluid (Not Included) RefillableRefillable Hand Warmer Replacement Burner Is Available