Head over to Walmart and get the Crest 3D White Whitestrips Professional Effects,Twin Pack, 40 Treatments for only $44.88 Shipped! (Reg. $90) This is an awesome price for two sets of treatments. Usually you pay this for only one. This will last 12 months or more. Use it once a day for 30 minutes to remove 14 years of teeth stains and for a whiter smile.