Oh, Brilliant!

I have had my teeth professionally whitened three times in my life. The first time was ten years ago: I splurged on a treatment at a really, really expensive chain, and the results were…pretty good, from what I can remember, although I also remember wishing they had lasted longer given how much I spent. The second time, I got custom trays from my dentist. It cost a fortune, I thought I was going to choke on the cement-y compound that he filled my mouth with to make a mold (seriously, it was c...