Your using 2 tubs then 1 is in the other?

I understand most of how you make them but couple of questions.

1. you have a bunch of holes in the bottom of the 2nd tub ok so second tub is the top
tub with the worms in it? And what does that screen do just keeps worms from falling
through all the holes?

2. how do you get the tea out?

I want to be able to have it like that fella had his where he turns a valve and out drains some
tea. I suppose I can make a bulkhead fitting and silicone a valve in.