Every step of the Manischewitz winemaking process is 100% Kosher, and certified by the Union of Orthodox Jewish Congregations of America. From the crushing of the grape to the final bottling, the entire process is completed under strict rabbinical supervision and is handled only by learned and reliable Mashgichim. Additionally, all Manischewitz Wines are mevushal, so they maintain the Kosher certification no matter who opens or pours the wine. Once again, the pasteurization, fermentation, and bottling are all done under the strict supervision of the Mashgichim. The respected Kosher designations honor each and every bottle of Manischewitz Wine. The OU designation can be found on all Kosher wine, and the OUP designation is used to certify all Kosher for Passover wine. The strict Kosher process ensures that all Manischewitz wines will satisfy not only your demand for purity and quality, but also your desire to uphold the laws of Kashruth.