Whats the shelf life of synthetics? Also whats the shelf life of ACTUAL urine? Im sure with synthetics if unopened they should be ok for a couple months at least, but if that is the case what kind of temperature should they be stored in? Im trying to devise a plan of possibly just having some synthetic stored away in my car in case a random UA does come up. Obviously if they require to be froze/refrigerated that wouldnt be possible.