I have my test the 16th. I leave work and go about 2 blocks away for the test. The QF is in the mail and should be here friday or monday at the latest. I may not have access to a microwave Killer, Is this an issue? Can't I just crotch the bottle for a few hours to warm it or may this not be enough?

I could use the microwave at home at 8 30 am but the test isn't until 2pm. I do have other hand warmers around if the one provided doesn't work. I may just wrap the bottle in a warmer or two. How much can I trust the temp strip on the QF bottle? Should I grab a digi and check it right before I go in the building?