- Two cardboard boxes 

- Eleven glass bottles 

- Water 

-Gorilla tape 

I discovered that it is easy to tune bottles to a certain note because they have a echo sounding projection rather than sharp and crisp. This gives lots of room for error even though the noise will sound in tune. This is because no matter what volume of liquid you put in the bottle the sound flattens as you lose breathe and sharpens as you push breathe so the tuning is somewhat up to the breather!