I have 2 zippo hand warmers.. Love'em and used them throughout hunting season. They work great after a bit of learning curve. Walmart has them, it's where I bought mine. I saw some today at Walmart for $13.82 each. One tip I learned the hard way,, do not fill them the night before,, Fluid will evaporate overnight. Always fill right before use and then light immediately before your trip begins. I have been telling all my friends about mine and would buy them all over again.. Good Luck,, !!