Hand Warmer by ZIPPO The Zippo Hand Warmer is built for winter warriors; it features a sleek and compact design, and fits easily into pocket, gloves and trousers, without the bulk of other hand warmers. The Hand Warmer uses Zippo premium lighter fluid to produce more than 10 times the heat of traditional models and lasts for up to 24 hours. It is exactly what you need to keep winter at bay and perfect for outdoor activities such as golfing, fishing and hiking, or simply walking to work. It generates its heat via a detachable catalytic burner unit. The catalytic burner usually last 70 - 80 uses and should be replaced periodically.