Stainless steel insulated cup is a cup made of double layer stainless steel inside and outside. It uses welding technology to combine the inner liner and outer shell, and then uses vacuum technology to extract air from the interlayer between the inner liner and outer shell, achieving the effect of vacuum insulation. FDA food contact materials refer to materials that meet certain safety standards when in contact with food, as specified by the US Food and Drug Administration (FDA). These materials should not release toxic chemical components during contact with food, and should not affect the odor, taste, and color of the food to ensure human dietary safety.

The FDA Food Contact Material Testing Guidelines for Stainless Steel Insulating Cup mainly include the following steps:

1. Determine testing standards: According to FDA regulations, stainless steel insulation cups need to comply with relevant FDA standards and regulations. These standards and regulations may involve aspects such as material safety, chemical composition, and physical properties.

2. Select appropriate testing methods: Different testing methods may be used for different materials and product characteristics. For example, chemical composition analysis, migration testing, toxicity assessment, etc. may be required.

3. Preparation of samples: According to the requirements of the testing method, prepare a sufficient number of samples that meet the requirements. Ensure that the sample has not undergone any processing to reflect the true condition of the product.

4. Submit testing application: Submit the sample and testing application to an FDA recognized testing agency. The application should include detailed information of the product, testing purpose, applicable standards, etc.

5. Conduct testing: The testing agency will conduct testing on the samples based on the submitted testing application and applicable standards. This may include chemical analysis, physical performance testing, toxicological evaluation, etc.

6. Obtain a testing report: The testing agency will issue a detailed testing report that explains the test results of the sample and whether it complies with relevant FDA standards and regulations.