"Mix it, Stretch it, Boil it Up! Burn Copper Pot, Burn!" (燃えろ寸胴!混ぜて伸ばして茹で上げろ!, Moero Zundō! Mazete Nobashite Yude Agero!) is episode 168 of the original Naruto anime.
Eager to have some Ichiraku Ramen, Naruto and Chōji quickly go to the bar only to discover that it is closed early. They find out that Teuchi is trying to prepare a new kind of ramen because his daughter Ayame was taken hostage by the rarely heard of cooking-nin, who are led by Hakkaku. Naruto, Chōji, and Sakura offer to help. Teuchi tries to teach them how to cook, and the three take advantage of theirninjatechniques to make the perfect bowl of ramen. When they rescue Ayame, they became shocked as they noticed she has grown fat due to being unable to resist the cooking-nin's food. To bring her back to her regular self, she eats her father's diet ramen that appears to be designed to make the customers lose weight from eating it. However, Teuchi also had eaten the diet ramen and ended up losing too much weight.