PURPOSE: To improve the quality of food and drink while utilizing far infrared radiation energy by working natural rocks such as a serpentine into an appropriate size or an appropriate shape, or by leaving as it is or working natural gems and stones, and by immersing this into water or the other drink at the time of cooking of various food and drink.

CONSTITUTION: Those which are manufactured into various sizes and shapes by making raw material of natural rocks containing iron, nickel, calcium, chromium, manganese, zinc, aluminum, titanium, or the like, or natural gems and stones containing the same substance as above are immersed into water or the other drink at the time of cooking of various food and drink, then water is activated by the action of far infrared radiation energy and the above substance, and even abundant minerals can be eluted. Since the utensil or device like this makes raw material of mineral natural rocks, cells and nutritive substance of food are not destroyed, and most flavor remains, and also nutritive mineral vitamine-containing water is produced, and further the food and drink using the produced mineral water tastes good and is beneficial to health.