na ohni urcite nie, moze sa pokazit. tuto by som nekupoval lebo je z ciny a pochybujem ze je to pravy tetsubin. vyzera to tak ze budem musiet setrit na drahy japonsky ale oplati sa ak pijes caje denne :)
tu je vynikajuci, velmi podrobny clanok o tom preco je vlastne tetsubin ovela lepsi ako rychlovarna konvica:

"In general, the use of a Tetsubin will enhance the taste of the water used. It will give your water a pleasant after taste and long lasting flavor. For tea drinkers who are seeking to enjoy a stronger after taste in their tea, a Tetsubin is suitable for all types of tea. In addition , it will reduce the unwanted aromas of your water. Usually, the first thing that a novice Tetsubin user tends to appreciate is the change in the aroma of his tea, rather than the actual taste. Frankly speaking, you do not need a Tetsubin if you just want to enjoy the aroma component of your tea. However, if you compare two different cups of tea, one brewed with water from a Tetsubin, and one brewed in a stainless steel teapot; you will find that the cup brewed using water from a Tetsubin will definitely have a deeper aroma and flavor.
As to the taste of one's tea, the effect that the Tetsubin has on the taste of the water, and hence the tea, differs from one Tetsubin brand to another. This is due to the difference in the raw materials used and the techniques applied in the making of the Tetsubin."

cely clanok: http://www.hojotea.com/categ_e/tetsubin.htm