Fill cauldron with custom fluid in Modder Support Posted September 21, 2020 Hello, I created a new fluid and want to have the abillity to store it in Vanilla Cauldrons? How do I do that? I tried setWaterLevel, but it just fills the cauldron with water (surprise ), so how do I replace water with my own fluid? I'm currently working on 1.11 but also want to port to every version from 1.7.10 to 1.12. Thanks.