When making, first saw two saws between the two ends of the bamboo tube according to figure 1, and then saw off the upper part with a knife (pay attention to safety when operating with a knife! )。
2. Then drill a 5mm hole in the opposite direction slightly above the bamboo joints at both ends of the bamboo tube, and then plug it with two rubber or wooden plugs.
3. Unscrew the cover, drill a hole with a diameter of 2mm on the cover, pass through a section of 500mm long nylon rope and wrap a bamboo stick with a diameter of 4-5 (mm) long 15mm (Figure 2).
4. Drill a round hole with a diameter of 20mm at the corresponding position on both sides of the lower end of the beverage bottle. According to Figure 3, insert the bamboo tube into the two holes, and the exposed ends should be equal in length, and then pour paraffin (or glue) to block the joint to prevent water leakage. Middle school students' science and technology network