Kosher wine has been gaining popularity among mainstream consumers recently, but the laws are detailed, and often complicated. Contrary to popular belief, kosher wine is not blessed by a rabbi; instead, once the grapes are pressed, only Sabbath-observant Jews can touch the wine. If a non-Jew or even a non-Orthodox Jew touches the wine, the entire vat has to be thrown out. In order to make sure that no gentiles or heretics have touched the wine, an inspector (often a rabbi) must have access to the premises at all times, so he can watch for perpetrators.