At present, the simplest way to pump liquid is to use a rubber tube or plastic tube, such as adding gasoline to a car or motorcycle. Some use a bucket to refuel directly, and some use a leather tube or plastic tube with one end Insert the oil barrel and suck the other end with your mouth. This method is extremely unhygienic. Sometimes the suction force is too strong and the oil will be choked into the stomach, which is harmful to human health. Using a mechanical pump to pump is expensive and bulky, making it difficult for ordinary people to use. In daily life, we often worry about inverting the liquid in the container and cannot find a suitable tool. The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a vacuum-like telescopic bag to generate suction force and combine with siphon