Can a stainless steel thermos cup still be used if it has rust spots

Stainless steel thermos cups with rust spots can continue to be used, but they should be cleaned thoroughly to avoid affecting health.

1. Reasons for rust spots on stainless steel thermos cups
Due to long-term use or failure to clean the stainless steel thermos cup in time, coffee, tea stains, milk, beverage and other beverage stains will remain on the bottom, interior walls and other parts, which will cause the cup wall to rust over time. The stainless steel material itself is rust-free, but the stainless steel thermos cup is not made of 100% stainless steel. Inferior stainless steel or other materials may be used excessively in key parts. Rust will appear at the bottom and center area, which is also the reason why stainless steel thermos cups have rust spots. important reason.
2. How to clean a stainless steel thermos cup with rust spots
Stainless steel thermos cups with rust spots need to be cleaned thoroughly. After all, rust spots can affect health and cause inconvenience to daily life. The specific cleaning methods are as follows:
1. Use neutral detergent to clean the inner and outer walls of the cup. You can use a sponge or soft brush to clean. Be careful not to use hard abrasive cleaners in this step, as this will spread rust spots.
2. After cleaning, put the cup into boiling water. The water temperature should be as high as possible, no less than 95℃ per minute. Let the water stay in the cup for more than 10 minutes. This step can clean deeper rust spots.
3. Soak the cup in baking soda water for about half an hour, and wipe the inner and outer walls of the cup with warm water.
4. After rinsing again, let the cup dry.

3. Will rust spots affect the use of stainless steel thermos cups?Stainless steel thermos cups with rust spots can continue to be used, but they need to be thoroughly cleaned to avoid affecting health. Rust spots will not affect the insulation effect of the double-layer vacuum insulated cup, because rust spots will only appear on the parts of the cup that do not affect the insulation.
If you do not clean it thoroughly or do not pay attention to cleaning the inner wall of the cup, rust spots will spread over time and affect your health. Therefore, you should develop good cleaning habits when using a thermos cup and clean it every day to prevent the growth of rust spots. At the same time, it is also very important to choose a regular brand of stainless steel thermos cup or a thermos cup with guaranteed quality.