Warms me to the roots

Today I boiled a mouthguard to make a sort of working [template?] [trial?] [first thingy?]. It turned out to work REALLY WELL. I highly recommend using the EZ Gard brand boil mouthguard. It was so perfect that my fingerprints were picked up in the plastic, and it didn't burn me like I remember it doing in middle school when I was playing lacrosse...

First you boil it:

...

After 12 seconds you take it out and squish it on your teeth

It warms your teeth to the roots

Perfect!

I am going to string floss through this one first to see if I can match up the threads correctly to my front and back tooth gaps, and get it to work. I won't be too bummed if if doesn't, it'll still be a really useful [thingy].