Presto’s Vacuum Leak Tester purposely complies with various national and international quality standards. The testing instrument is used to analyze visually the consistency of the foiled cups when kept under vacuum. To perform the vacuum leak test, a definite amount of vacuum is created inside the chamber to evaluate the integrity for the purpose of the leak proof of the foil packaging. The test is done to assure that the seals are unbroken and perfectly fine. It is a test procedure which is performed before transporting the product for warehousing or storage.