This question has options. How would someone go about accomplishing this goal?
What can you use as a pickle weight when constructing a fermentation jar for pickling?

pick from the following.
(I) Use any metal object that is just small enough to fit through the mouth of the jar. A full can of beans is a good option..
(II) Use a glass or ceramic object that is just small enough to fit through the mouth of the jar. A stemless wineglass is a good option..
(II)