Depending on the different fruits, there are different periods of time, some of the faster oxidizing fruits without refrigeration is recommended to drink within an hour. But like orange juice ㄧ type, even without refrigeration can be stored for a longer period of time, (basically more than 1 week of juice even if there is ice I do not want to touch it ....). I would not want to touch it even if it is iced for more than a week. Because some nutrients in non-living (after you pick it) organisms, especially without the protection of the fruit skin, it is easy to be infected by bacteria or the environment is not adapted to the necrosis. The nutrients are not only ineffective, but also ineffective. Eat not only did not have the original effect of eating bad stomach will be a problem.