Originally Posted by Paloaf
My practice is to dispose of any unused wort. You spend so much time and effort making the wort sterile, that I would hate to open it to infection while in the fridge and after being opened. Plus there's a lot of break material in the last 100-200 ml that I throw away anyways.
I'll second this.
If you need to do smaller starters, just use different size canning jars (1 pint, 1 quart, 2 quarts, etc) and you'll have flexibility. That's what I do. 1-qt or 2-qt.