Zippo 6-Hour Pearl Hand Warmer. Zippo's improved filling process makes firing up these little furnaces easier than ever. Fill the cup. Light the burner. And go Provides up to 6 hours of gentle consistent heat. And they're odorless. So the only thing that stinks is the alternative to not using them. Frozen fingers. Specifications for Zippo 6-Hour Hand Warmer: Manufacturer: Zippo Gender: Unisex Weight: 2.6 oz Blade Material: Metal Features of Zippo 6-Hour Hand Warmer: Includes easy fill technology Improved fill cup helps reduce spills Perfect for all cold weather activities Sleek thin design fits into the smallest pockets Flameless gentle warmth provides 2.5X more heat than disposables Rugged and durable metal construction Virtually odorless - Great for hunters Package Contents: Zippo 6-Hour Hand Warmer Zippo 40322: 6-Hour Pearl Hand Warmer