heat by yourself / belt

When you heat the infusion tube by your body temperature until the temperature is near to your body temperature, the liquid entering into your body will not make you unconformable and damage the drug proprieties.
Compared with the heater in the market, belt can be used without electricity, which is safer and more convenient. It also more environmental because it can be used many times. For the producers, the belt is more suit for mass production because its simple structure.
The belt is applicable for the patients traveling outdoors and the some areas which are cold, impoverished and lack of electricity