All of the previous experiments have produced very high-pitched sounds. I tried to acheive bass notes with a larger, more hollow object and using a softer material like plastic. Just like the glass you create different pitches depending on how full the bottle is but the sound is always very dull. The fuller the bottle was the better the sound but still very flat. I found using the drumstick was the best thing to strike the bottles with but the sound just wasn't of a good enough quality to use.