Do not expose it to sunlight for long periods of time.
Also if you know when your to be tested go to wal-mart or a sporting goods store and buy hand warmers.They keep a 90-100 degree temp up to 8-10 hour's and cost Approx 6 for $2
Just open them shake them and tape (or use a rubber band) it to the bottle.
BloodyRedBarron Reviewed by BloodyRedBarron on . Keeping Quick Fix warm Is it alright if I keep my quick fix on an electric heating pad to keep it warm for when I need it? Rating: 5