1, home use. Now young people are more tired at work, after work like to stay at home to rest, or lying in bed, or use the computer to brush the drama, or read a book to learn, can not walk around as much as possible, if you use plastic cups for drinking water, you can choose a large-capacity plastic cups, a bottle of drinking water to meet the whole day, plastic cups of the lid of the one-key switch, convenient and quick and avoid the entry of bacteria to protect the health of the water supply. Suggested capacity: 800ml. 2, vehicle. Vehicle vibration during operation is relatively large, which requires the water cup needs to be sealed, to avoid water spilled in the process of driving, and the material of the water cup should have a certain anti-shock function. Undoubtedly plastic water cup is very suitable. As a car cup we generally recommend: 600ml capacity, basically can be adapted to the size of the cup holder located in the center armrest. For some of the longer driving time owners, choose a large-capacity water cup, can meet the day's water replenishment. Suggested capacity: 1.5L In addition for the car water cup, it is recommended to choose a straw cup, because the car space is limited, using a straw cup does not need to tilt your head to drink water hair, very convenient. 3, students use. According to the age of the different, choose the small capacity, do not have to choose too large capacity. Elementary school students recommended capacity: 500ml. middle school students recommended capacity: 1000ml. 4, outdoor travel use. For example, outdoor walking may take 1-2 hours, you can choose the general capacity, recommended capacity of 600 ml. For some longer activities, such as outdoor hiking, may take a day, as far as possible, choose a large-capacity water cup, in order to ensure that the day's replenishment of water. Suggested capacity: 2.0L.