The Forever White™ Teeth Whitening Pen has advanced gel that whitens BETTER and with LESS sensitivity than competing brands. It’s so convenient and easy to use: just smile and brush on some gel. Teeth get whiter with each application. It’s perfect for touch-ups and on-the-go whitening. A pen contents  2 ml 36% Carbamide Peroxide Gel. No messy mouth trays and refrigeration are required. Enjoy guaranteed results with this product!