For the first 24-48 hours After Treatment you should Avoid any dark staining drinks like Tea, Coffee, Red Wine, colored soft or alcoholic drinks and fruit juice. Vodka should be fine. The acidic nature of flavored water may make the teeth more sensitive but will should not effect the whitening. Avoid all dark staining foods like bolognaise, soy sauce, red meat, chocolate and all fruit except bananas. Avoid any foods or drinks that would leave a stain on a white shirt. No Smoking for 24 hours, smoking a cigarette within the first 24 Hours will stain your teeth. Ask your dentist about smoking cessation! Additionally, Avoid colored toothpaste or Mouthwash for 24 hours.