Hi first. I have purchased this product or the pocket warmer, as I've seen with my friend and he well gefiehl me properly. As it was, of course, Zippo; At first I thought that the price would be high again, for example. of the lighters, since it had just reduced to 20 I have now ordered him to the cold time. The warmer And arrived very quickly (as it was in stock). First unpacked and it comes the shiny thing to light. From the sight of her makes a noble, high-quality impression with the inscription Zippo plan forward. Had he presented me prop harder. But rather lighter than too heavy. Following the purchase of lighter fluid (not included in the package) I filled the pocket warmer. After filling it, the cartridge, and (not necessarily his Zippo) lit with a normal cigarette lighter. after about 20 seconds already warmed up the case and you could make out the lighter. Cover it and into the bag. After about 3 min. The thing was already really hot that you had to leave it in there already in the bag, as it in the hands becomes too hot for a time. In bag inside is exactly the thing perfectly measured from the heat her.die burning time fraud exactly 16h and 45 min. After this time, the case was still warm, but got colder with time. After the cartridge cool down you can fill into new fuel. All in one is this thing very well, in contrast to the crease heaters are cold after about 30 min. The warmers provides a really good heat, looks elegant and is almost odorless to. Proceeding with his nose close to it you can feel the smell which is normal, but otherwise one does not smell the petrol. Does not need to be afraid that if you, for example, at work or school for which it smells like a gas station. Now come some tips for filling and used properly: Always use only lighter fuel, regular gasoline could fatale folegen have !! (flame, etc.) It is his little plastic jug and are depending on how much you want to have in the pot, but never more than the maximum, because otherwise the fuel could leak and can ignite !!! And it fits even a jug of gasoline in the hand warmer! Taking into the two things that a fire hazard is excluded. After filling the jug plastic, remove the cover as well as the underlying cartridge with steel wool innendrin !! Gets the cartridge contact with the fuel, it can go defective and unusable. Filling the pot is a bit cumbersome, so you have easy clean blow through the large opening to the mouth. (Caution swallow any gasoline, the blow in the mouth to the pot sunning her blow the gas out of the pot.) After filling the bag warmer, again checking if nothing runs out and turn the pocket warmer to test everything is tight. If anything runs out, the cartridge properly sit on and wait for about 1 minute, because the gasoline must distribute first. After one minute a lighter take (does not have to be of Zippo) and the pocket warmer upright with the cartridge keep up and keep the lighter in the running direction of the flame to the cartridge, ie. when the flame from the lighter rises, these stick to the cartridge (which has already been placed on the pocket warmer!), which also is vertically upwards, so no soot is formed on the cartridge. The fire is the first time a little hard, but you should the lighter while dranhalten until you feel a warmth of the housing center. This may take up to 35 seconds. persist, according as we practiced it is also up to 20 sec. If you feel a warmth in the middle of the housing, you can turn off the Feurzeug and it put the lid. Once the pocket warmer is a bit heated and he really inflamed, you can tuhen the pocket warmer in the supplied bag. After about 3 minutes. is the Taschenwärmer very hot and has after about 4-5min. his höchsttemp. achieved. ------ That's it, and I would buy such a part again of the company Zippo. A small improvement: the Befüllkänchen could be made a little better, so that the fuel can flow better in the pocket warmer. otherwise I wash you much fun with the heat bag and a Merry Christmas Your Sebastian from BW. (Neckar Odenwald)