No flavor, no color, no smell, easy to use
This is my first time using teeth whitening product. After even one time use you can see the difference. Teeth become whiter. Follow the instructions they give you on the package, they are easy. Easy to apply. No flavor and color which I like. You will need to swirl the bottom of the pen many times before you will see its first gel drops come out. There are four pens in the package, so, I believe it is going to last for months. I would definitely recommend this teeth whitening pen.
Rating: 5 stars