Colgate Optic White express

Here's some information about this product:
Designed for No Tooth Sensitivity:
It's formulated to minimize tooth sensitivity during and after the whitening process.
Enamel-Safe Formula:
The pen contains an enamel-safe whitening gel, often with hydrogen peroxide as the active ingredient.
Precision Application:
The pen design allows for precise application of the whitening gel directly onto the teeth, avoiding the gums.
Quick-Drying Serum:
The formula dries quickly on the teeth, making it convenient for overnight use.
Visible Results:
Users can expect to see visibly whiter teeth, with some formulations promising results in as little as one day or one week with consistent use