Grail As Cauldron

Story Origin
Could it be that Jesus was actually creating an elixir in a cauldron from which each disciple would drink? Perhaps the goblet held his blood, as is symbolically represented in Catholic Mass, or was the Holy Grail something else?

In my stories, the Grail is the womb of the female scion, and the cauldron is  a cooking pot capable of feeding or curing endlessly, while there is also a scrying fountain the size of a cauldron on pedestal that is capable of seeing anyone, anywhere (similar to the crystal ball of the Wicked Witch of the West in Wizard of Oz).