Fed up w/ the vile off the shelf lemon juice, I decided to stick to the real thing (why it took me so long to figure this out is another matter completely). Rather then use a single lemon, Id like to use 5 or 6 lemons (or limes) at a time for convenience. Is there any specific way I should store straight lemon juice? In glass or in plastic? Covered or not covered? Refrigerated or not? Will it sit well or do I need to add some other ingredient(s) to increase its shelf life? Any thoughts, in non-chemical engineering speak, are greatly appreciated. TIA.