Первый раз слышу. Какой смысл, если поры закрыты глазурью?http://cookingwithshirley.com/cooking_in_clay_pots.htmThere a certain rules you must adhere to if using the unglazed clay cookers.  Otherwise they can break or taste of soap.  These rules are as follows:     * The clay pot and lid must be soaked in water for at least 15 minutes before using.  If part of the clay pot is completely glazed, do not presoak that part before using.