If youre giving a sample in privacy, devices like the Urinator or any other artificial delivery system are totally unnecessary.

The Quick Fix 4.0 (the current formulation, BTW) comes with a heat pack which can be attached to the bottle. With the heat pack activated and attached, the QF will remain at proper temp for over 6 hours. Handwarmer packs can also be purchased at any sporting/camping shop.

For hiding and carrying tips, follow N2's post in the Substitution sticky thread. You'll discover this method to be easier than any bulky delivery device.