Crest 3DWhite Brilliance 深層去漬超白牙膏，2.1oz

The fact that it's meant for everyday use is what sold me, and it hasn't disappointed—no sensitivity after a week. My coffee stains are visibly lighter, and the paste itself doesn't leave that weird gritty film in my mouth.

After just a week I can already see less staining from my morning coffee. It feels like a proper daily toothpaste but the whitening effect is noticeably faster than other kinds I've tried.

I’ve been using this toothpaste for about two weeks now and my morning coffee stains are definitely less noticeable. The formula feels gentle on my teeth too, which is a big plus since I have sensitive gums.