Currently water bottles cannot empty into nor be filled from liquid barrels. This also applies to bottles and fluids from other mods, even if the mod has both a bottle and fluid form of a substance.

I'd like to add/request compatibility with animania milk for this as well. While it is currently possible to add milk to the barrel, you cannot get it out with a bottle (possibly because there is only 1 milk bottle in the game but 5 or 6 milk variants?)

@WrongWeekend are u referring to Inspirations mod?

Would be nice if "right clicking" while holding a liquid barrel was actually a thing