PURPLE TEETH WHITENING PEN: Premium Purple Toothpaste Whitening Pen uses color-correcting technology to whiten your teeth, providing fast, temporary whitening results. Consistent use will effectively improve yellow teeth. COLOR CORRECTION TECHNOLOGY: Purple Teeth Whitening Gel uses color correction technology. Purple is directly opposite yellow in the color wheel and is therefore a complementary color to yellow, so a water-soluble purple dye is applied to the teeth to eliminate yellow undertones. EASY AND CONVENIENT: Our teeth whitening pen is easy to use. Simply apply it directly to your teeth to target yellow shades or discolored areas for whitening. The soft brush head and twisting mechanism allow you to gently and effectively apply whitening serum to each tooth for complete and thorough coverage. QUALITY YOU CAN TRUST: This purple teeth whitening pen is manufactured using the highest quality standards to provide a reliable and safe solution to your dental care needs. GENTLE STAIN REMOVAL: This purple teeth whitening gel is very effective in whitening and stain removal. It can help you remove years of stains caused by soda, smoking, coffee, wine and more!