I have several sourdough starters that I have in the fridge, plus one that I keep on the countertop.
I currently have them in plastic containers with lids. However, I would like to have more than one on the countertop for when I want to make multiple breads from different starters.
However, I have heard that you aren't supposed to keep your lids airtight on sourdough. I am concerned about having one culture take over another if they are exposed to air. Is this a silly fear?