Okay, this thread persuaded me to go out and buy the book and a few bread baking necessities. I'm going to mix up my first batch of dough tonight. My only question (for now) is, what do you keep the dough in to refrigerate? The book seems to go back and forth on airtight/non airtight container. Would a large tupperware container be okay or do I need something with a looser fitting lid?