Does the questioner want to ask "Why do stainless steel instant noodle bowls have white spots"? Oxidation spots, scale.

1. Oxidation spots: When stainless steel is exposed to the air, an oxide layer is formed. The oxide layer is uneven and white spots are formed.

2. Scale: The stainless steel instant noodle bowl is used for a long time without being thoroughly cleaned, forming scale, which turns white.