Splash and lingering water bottles can be used to create mud

Splash/lingering water bottles can be used to create mud from dirt when right clicking with them on dirt. If done in survival mode, you get an empty bottle back, which does not seem to be consistent, with the general game mechanics regarding bottles and splash potions. To recreate, just open any world in 22w11a, give yourself a splash or lingering water bottle, and try right clicking dirt in survival mode.

Code analysis by [Mod] ampolive can be found in this comment.