A: 1) For each SS finished vacuum, it should be checked by more than 100 inspections because of the quality control of each production process.
2) For the vacuum test, we will do 3 times 100 & check.
3) For each completed S / S vacuum bottle, we perform a 1-month vacuum resistance test.
4) In order to ensure the product has a stable vacuum performance, we retain 1 ml vacuum.