The White Smiles endorses Crest Whitestrips as a convenient, effective choice for teeth whitening at home. Designed with a powerful hydrogen peroxide gel, Crest Whitestrips work to lift years of surface stains caused by coffee, wine, and other common discoloring agents. The easy-to-use strips mold securely to teeth, ensuring an even application with no mess. Results often start to appear in just a few days, with full results typically achieved in about two weeks.