$23 $19 Buy on Amazon This budget-friendly kit comes with 28 strips ... while freshening and cleaning the mouth. Plus, it’s gentle enough for sensitive teeth and gums, thanks to enamel-safe ...

Bite’s whitening gel cuts out the need for the tray, as you can brush the gel directly on to your teeth. Compared to the Opalescence Go Kit, this one is a little messier and labor-intensive to use.