ปากกาฟอกฟันขาว - วานิลลามินต์

I was skeptical about the 6-shades-in-7-days claim, but after a week of using it each morning, my coffee stains are genuinely lighter. The twist-action applicator makes it easy to target specific teeth without any mess, and the soft bristle tip is gentle on my gums.

The vanilla mint taste is actually pleasant, not that fake chemical sweetness you get with other pens. I’m on day four and already noticing my coffee stains are fading, plus the brush tip reaches my back molars without gagging me.

The twist-action is super easy to use one-handed before work, and the vanilla mint taste is subtle enough that I don't need to rinse right away. After a week, my coffee stains are noticeably lighter, which is exactly what I hoped for.