Just as long as you don't hold it too long afterwards!

Seriously though guys who has shaken it only twice!! lol Because if that's the case then i play with it.

COLD---only if i forgot to close the zipper---draft

pissing should actually make you warmer because your body does not have to exert the energy to warm the piss up....

Sounds to me like you need to stretch that thing out a little further were you can piss out past your clothes.....hellooooooo!!!!!!haha

Let's think about this logically, with numbers: If your pee is warmer than your internal body temperature surrounding your bladder, then peeing would lower the average temperature in that region. If pee is cooler than the temperature of the tissue surrounding your bladder, then peeing would raise your internal temperature.

Next time you pee, pee on a thermometer and read it. Then stick it in your mouth and see what your internal temp is and tell us what you find out!

I am usually cold when trying to hold it and feel warmer when I am done....

By the look of that little picture over there if thats you ,then i would say you probably like puting things in you mouth..[SUGAR BRITCHES]

Okay I do not want to get scientific, and I have not read all of the posts so maybe this has already been covered but here goes:

You can feel colder immediatly aftering peeing because it is warm in your body - but over the long run you will be warmer and have more energy with an empty bladder because of the amount of energy it takes to keep the liquid warm in your body.

Technically speaking...
Urine does not produce heat. It absorbs heat from the living tissue around it that is actually producing the heat. Therefor....Having an empty bladder will cause less heat to be absorbed by the urine. This would allow your body to more easily maintain its internal temperature.