Opalescence Go whitening comes in prefilled, disposable trays, so it’s easy to take with you anywhere you go. Opalescence Go offers a whiter smile in just 5–10 days with wear times of 20 minutes per day. We carry 15% Hydrogen Peroxide strength in the office. 10 trays are recommended for people bleaching for the first time. 5 trays every 6 mos are recommended for touch ups. 2 trays a day are recommended until treatment is complete. The cost of 10 trays is $65 and the cost of 5 trays is $35.