Colgate® Optic White™ Toothbrush + Built-In Whitening Pen. Med. Whiter teeth in 2 days*. 1 Toothbrush and 1 whitening pen with 0.16 fl oz (5 ml) gel. Brush. Whiten. Go™. Now you can get a whiter smile in 2 days* with Colgate® Optic Whiter™ toothbrush + built-in whitening pen. Whitening that fits into your life, without the hassle or mess. It's as easy as... Brush. Whiten. Go™. Toothbrush: made in china whitening pen: Optic White™. Toothbrush + built-in whitening pen. Remove insert for additional information. 1-800-468-6502. www.colgateopticwhite.com.