I bought a couple of hand warmers last year, I play a lot of golf and so I thought the Zippo would be good to keep my hands warm during a cold game of golf. Wow! I was right, in fact at times it was too warm, when not in use I used to keep my hand warmer in my pocket but the heat was too much in a confined space. But d not let that put you off they are brilliant. Eventually I needed a replacement wick, but as you cannot buy the material I had to buy this product, It works well as one might expect, as its a direct replacement. The only down side is the cost, and the fact that you need to buy the metal grid along with the wick, so now I have a metal grid sat on a shelf which seems to be a waste.