After The Bleaching Programe you should to avoid very hot, very cold drinks for the first 24 hours if any tooth sensitivities exists.And avoid colored food, drink and smoke cigarette for the 48 hour to keep whiten smile for long time.

Some List of Dish is colored your tooth

Food

Drink

Other

Sweet-Green Curry (Thai Food) Red Wine Cigarette
Spicy Indian Curry Cola Tobacco
Coffee Certain Medicines(Tetracyclins)
Tea Cranberry
Chocolate Blackberry
Sour Fruit Juice