Dr. White Tobacco, Coffee, and Tea Whitening Toothpaste 100ml, thanks to its unique formula, prevents stains on teeth caused by tea, cigarettes, and coffee. It is effective against pre-existing teeth stains. Whitening toothpaste. You'll notice its effect on your teeth from the first day. Use twice a day (2-3 minutes each time) or as directed by a doctor. Children under 6 should use a small size (pea-sized) and brush under adult supervision. Open the lid and press the vacuum pump from the top to dispense the desired amount of toothpaste.