The Max White Ultimate Tooth Whitening Pen from Colgate is a 2.5 ml whitening serum designed to give you a brighter smile easily and quickly. Its advanced formula gently targets stains caused by coffee, tea, and smoke, ensuring visible results in just a few days. Easy to apply thanks to the handy marker, it allows for targeted treatment without waste. Perfect for those who want an effective and professional whitening effect at home, keeping teeth whiter and looking natural.