Got word frjom FBR that it is perfectly fine for up to a year in case anyone wanted to know. It could even be good for up to a year and a half. It can also be thawed out and refrozen several times as long as it doesn't extend the "allotted" room temperature. I know there are some that question the method behind my madness of freezing my own urine after I get it cleaned up. What's so bad about that? The main differences I see is that I save lots of money by not having to buy artificial AND I KNOW it's clean. Once you let it thaw out and gets to room temperature you treat it like the QuickFix things.