Substance Flow

[Dredi]

In the "Dunwarren - Traveling" area there is a "Substance flow" placable surrounded by red caps.

The item it attached to a conversation which allows you to collect substance at DC of 5, 1 time per day per person.

On successfully meeting the DC, no item is dropped however.

[Moonlighter]

Yep. I noticed this as well.

I think you might need an empty bottle?