You will only need a few things.
- A plastic bottle that can hold pressure. I used a carbonated water bottle. Anything should work as long as the top seals.
- A tube that your pneumatic hoses will fit over. I used some hard plastic ones that come in some lego sets.
- Glue-preferably something thick. I used hot glue.
- Something to make holes in the bottle cap about the size of the tubing. I used a drill but any sharp pointy object will work.