ペットボトル点滴水やり装置
https://www.youtube.com/watch?v=tFhaHGqwiyU
https://www.youtube.com/watch?v=JMHwf_d6KbA
https://www.youtube.com/results?search_query=%E7%82%B9%E6%BB%B4%E3%80%80%E6%A0%BD%E5%9F%B9