CREST 3D WHITE SHIMMER WHITE WHITESTRIPS REMOVES YEARS OF STAINS, FOR A WHITER, GLAMOROUS SMILE. START SEEING RESULTS AFTER 3 DAYS. ADVANCED SEAL TECHNOLOGY PROVIDES A FORM FIT, NO SLIP GRIP THAT MOLDS AND ADHERES TO YOUR TEETH FOR A BETTER WHITENING EXPERIENCE. IN FACT, YOU CAN EVEN DRINK WATER WHILE WEARING WHITESTRIPS WITH ADVANCED SEAL TECHNOLOGY.