Thanks, Anon. Today I bought some supplies and started experimenting a little with subbing. I got several small 3 oz travel bottles, a baby thermometer, some hand-warmers and some tighty-whiteys (a size smaller than I'd normally get for extra snug fit). Took my own sample and immediately took the temp: 97.6. Then I crotched it w/o any kind of warmer and monitored temp changes. Was surprise thatd after 15 min it'd already lost 2 full degrees and got a little worried that it'd be well below 90 by the time I could get to a lab and get in to test, but that was while I was mostly walking around and it wasn't super snug up in there. For the next 15 min I mostly sat with legs pressed firmly together and much to my delight it actually gained a degree back (to 96.2). I then had to run an errand driving so took it with me and when I was done 30 min later the temp had jumped even more all the way to 97.7, a tenth of a degree *warmer* than when it left my body. PERFECT.

So I'm no longer so worried about temp control: my body seems to keep it well above the required minimum and of course there's no way my body would OVER-heat it, so I believe I'm set without even worrying about the hand-warmers.

So now my biggest question is what to use as my sub: I have 3 oz of synthetic on order for delivery tomorrow and my buddy who lives out of town is coming in too. He'll pee for me and I'll fill two bottles just in case, and then immediately freeze them. Am a LITTLE worried about that though.

DOES ANYONE KNOW.... does the freezing/unfreezing process do any damage to the sample or produce any measurables that would let them know the sample wasn't fresh from a bladder, ie, that it had been frozen and then thawed? I like the idea of using real urine over synthetic, but since I'd have to freeze and then thaw I'm kinda leaning towards utilizing the synthetic. I'm going to do a little digging around to see what I see but if anyone has any success/failure stories with freezing or any scientific info around why that does/doesn't work, i'd greatly appreciate it!!