Crest 3D White Professional Effects Whitestrips 20 Treatments + Crest 3D White 1 Hour Express Whitestrips 2 Treatments - Teeth Whitening Kit. Reveal a brilliantly whiter smile. Crest 3D White Luxe Whitestrips Professional Effects are like an eraser for your teeth. Remove the stains from the last 14 years in just 30 minutes a day.