The handle: In the fireplace in front of doubletap.

The foot: To the left of Cryo Slide Soda near the pile of boxes.

The container: On an end table to the left of Snails Pace.

The Extinguisher: In the lightning staff room on a shelf to the left. (Must have completed soul collection to access)

You will then be able to craft the sliquifier on the second floor above spawn.