Introducing the VieBeauti Whitening Pen. Amazon's got a three-pack on sale for only $12 when you apply the on-page coupon.

Introducing the VieBeauti Whitening Pen. A three-pack is currently on sale for only $14 ... so you'll already be saving big ...

We recently tried the VieBeauti Teeth Whitening Kit and were impressed ... tray clean and protected in between uses. The tooth whitening pen with soft brusher was more precise and comfortable ...

Purple Whitening Gels Pen 3 Packs, Purple Teeth Whitening Pens, Instant Teeth Whitening Paint Pens, Color Correcting for Tooth Stain Removal Color Corrector Technology: Our Purple Teeth Whitening ...

It has aloe vera in it, too, which Dr. Huang says is soothing to teeth. If you want a paint-it-on option that’s a bit easier to manage than Bite’s kit, a whitening pen might be your best bet.