Editor's Note: APYs listed in this article are up-to-date as of the time of publication. They may fluctuate (up or down) as the Fed rate changes. CNBC Select will update as changes are made public.

For better or worse, the first time I picked up a flat iron was in middle school, so it’s safe to say I’ve tried many throughout my life. As I’ve gotten older, I’ve learned which flat irons work best ...