Tanyu Claypots are made of natural Clay from Japan and incubated at an extremely high temperature of 1250 degrees Once heated, the claypot would radiate far infrared rays and this helps to distribute heat to the food evenly. Tanyu Claypot can be used on charcoal grill, gas stove and even in the microwave oven. How to care for Tanyu Claypot? 1. Wash new pots with clean water, bring half pot of water to boil. 2. You can use dishwashing soap and Steel Wool to wash 3. Air Dry your pots before storing Beware of IMITATION. All Tanyu Claypots have a branding underneath the pot.