I love the little thing, for your question you will need to keep your urinatior handy. Most jobs here have you drive your self to your own random piss test they just give you a time frame to be thier and then back at work. So depending on your situation you will have to addapte. First urine in its sample form is kinda fragile, you dont want to contaminiate it with water liquids or solids, the container it comes in helps with this. However it is also contaminiated buy light and temperature so be sure to keep it in a dark place a bedroom dresser is good for temp. Now as far as how long it last, the samples are rated to last a year in the container, however I have used mine and passed with a year and a half old sample. Once you mix the sample it is only good for about 12 hours max. now as far as the process of how the urinator works, you will need to always have 2 duracell 9 Volts handy. And a way to heat water to body temp rapidly. Personaly I have done this with a water fountain and my mouth in a pinch. You want a way to heat your water because the urinator will take long even run out the batteries, trying to turn cold water to 98 deg. water. Hell in a pinch I used just the urin sample and water I held in my mouth for about5 minutes. Since you can mix the water and then put it in the urinator or you can just put water in your specimen cup ,then mix the concentrated urine in the cup with the temped up water. this can be very versitle, because you will need a space about the size of a childs shoe box to store your urinator and the syringe to load it. But like I said in a pinch you can make it happen. If you have any more questions about the Urinator goahead and ask, I use it and 3 other of my friends use it. Before I used the urionator I lost some realy good jobs, my friend lost a government job that would have been realy nice if he still had. I lost a job that paid bank, because I had gotten caught with a random, it didnt matter waht I did or acomplished in that orginization just that the test came out dirty. Live and learn that was then this is now.