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 odourless. 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 - New Smaller Size Fits Into Even More Pockets - Flameless Gentle Warmth - Rugged & Durable Metal Construction - Lighter Fluid Refillable – Environmentally Friendly & Reusable