It's a bottle containing a yellow liquid.
It's a big cast-iron pot simmering over a slow fire.
Empty vials.
It's a tap used for emptying the contents of the pot into a container.
Whoops. That didn't seem to mix too well.
Nah, I already got that potion. I'm pretty certain I won't be needing any more.
I'll just pour the finished potion into one of these vials...
...like so. Fortunately, they're small enough to carry in my pocket.
I shouldn't waste any of the ingredients before I know which ones to mix together.