Dental Care Pen, Care For The Mouth Clean Teeth Yellow Tartar Fresh Breath Beauty PenOur dental pens contain lemon extract and sea salt. It can effectively remove stubborn tooth stains. Its use method is very simple: shake the pen, rotate the bottom of the pen, squeeze out the right amount of gel, evenly spread on the teeth, if you use the pen, you need to wait 30 minutes before eating, if you use it as an anti fouling pen, you need to wait 1 minute before drinking coffee, tea, red wine and other drinks that are easy to stain the