Did you play with rubber bands when you were a child? The longer the rubber band is, the slower the vibration frequency is. Does the shorter it vibrate faster? The sound produced by the former is very deep, and the shorter it is, the higher the pitch it produces.

The same goes for bottles. Beer bottles and soda bottles definitely don’t make the same sound when blown. To achieve the effect you want, you can refer to the following:

Find at least 8 beer bottles of the same size and put different amounts of water in them. Try how much you put in while blowing and master a principle. , the less water, the lower the sound. Then it can form eight notes from alto 1 to treble 1, and then you can play some simple songs. But it is best to get a few more and even the bass.