how do I make crafts with water, keeping the empty bucket after the craft?

It's fairly easy, create a custom alt crafting table with crafting procedures, and then make the output something and make the imput be cleared and put an empty bucket in the slot in blocky procedure editor in app, tutorials can be found in site.

You can also use something like this... https://ibb.co/w04CnBs.&nbsp.  Specifically, just the part where the full bucket is removed from inventory and the empty bucket is added to inventory.

Yo, could you write the same script for me, but for bucket with milk? Please and thank you. Im new and I dunno how to use some of this commends

I wish I could, but I'm not good with script.  If it wasn't for these drag-and-drop commands, I wouldn't be able to do anything.