And if it becomes unplugged... you'll lose everything. And your sink will be possibly stained forever. Whay Endlessness said is a really important consideration. It can be difficult to get naptha out of st b even in a sensible container.
For stb I use gallon hpde2 one gallon jugs. In my area, windshield washing fluid comes in them.
This is a good shape and they're pretty solid. The container needs a good screw on lid. Lye is dangerous.
Here's a pic to give you an idea:

Of course, you'll have to clean the container out well first.
Have you looked into the q21q21 tek 2 ? It's very easy, quick and safe. How much bark are you planning to extract from? You really don't need much dmt around at one time.
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