Cut out a sheet a foil that will wrap nicely around the bottle. Then wrap the foil around the bottle, I used tape to hold the foil onto the bottle. You can use glue if you want, but don't use flammable glue because of sparks, it is likely to catch on fire, or maybe even explode... Then I soothed the foil down onto the bottle to increase the efficiency of the bottle capacitor.
You can use something much much better than foil if you have, use foil tape. You can just simply tape around the bottle and not have a hard time wrapping the bottle with foil and tape (or glue).
––––––––––––––––––––––– "Energy cannot be created nor destroyed!" –––––––––––––––––––––––