Zippo's new and improved filling process for its hand warmers keeps you in the game. Up to 12 hours of heat for your hands and fingers. Includes Easy Fill technology. Improved fill cup helps reduce spills. Perfect for all cold weather activities. New smaller size fits into even more pockets. Flameless gentle warmth. Rugged and durable metal construction. Environmentally friendly and reusable. 5.3"H x 2"W x .4"D. Weighs only .01 lbs.