The puppet as you can probably tell is print outs stuck to an armature body. The water is cling film. Replacement faces were used, and a two part bucket so the water can pour out from inside.
I also make my arms + bucket swap sides of the armature as it raises it’s arms.

If you wanted to do something like this yourselves I’d recommend printing/sticking printout onto a stiff card/paper to reduce scuffing and crumpling. There are good examples of this ‘2D model’ style in short stop motion films online