There is no way to use a bottle in the microgravity environment of space, but in order to safeguard the lives of astronauts, the spacecraft are equipped with medical supplies such as astronauts' vital signs monitoring, and there are a large number of professionals on the ground to guide astronauts in dealing with some simple diseases.
The current human spaceflight can not support the astronauts in space of ultra-long-term life, the longest only stayed 2 years, many are to stay a month or two down, there are just a few days, the space environment will not have too much impact on the human body. Plus astronauts in the selection of the official astronauts before and after the need to go through a lot of physical, intellectual, psychological training to ensure good health in order to carry out space missions, after all, to go to space after there is no doctor, to see a doctor have no place to go, a healthy body to ensure their own safety, and to ensure that the task of the normal implementation of spaceflight activities overdue for three or two days may be a burden. There have been astronauts who ended up missing the launch of their spaceships and not making it to the space mission because of urinary disorders.
Physical health to ensure that astronauts in space in general will not suffer from serious diseases, such as bottles and other means of treatment, in some countries easily will not be casually used, in space for the gravity of the environment is also no way to apply, if necessary need to be injected into the treatment, but also choose the kind of can be externally pressurized by the injection of appliances. In the space station and other important space facilities, will also be specially equipped with medical personnel, they have undergone some medical training, can use a variety of instruments to monitor the astronauts' physical condition, mainly blood pressure, body temperature, respiration, electrocardiogram, the ground there is also an astronauts' health related to the team to guide the astronauts in the sky to take the appropriate life, rest and relaxation, to guide the psychological problems of the guidance, and so on.
The space station also has some fitness equipment, such as similar dynamic bicycle, treadmill equipment, astronauts can work in the spare time to carry out some fitness activities, but also can promote the maintenance of health. Astronauts in space because of microgravity, closed environment may also appear some small physical problems, but the general impact is not very big, back to Earth will slowly recover.