I started out with the standard 2 liter coke bottle DIY generator but after fighting with getting a good seal through the cap I found a small garden sprayer in the Harbor Freight ad for $10. I took a look at it and was able to just remove the sprayer hose and connect up the silicone hose. I got it started last night after washing it out real well and it seems to be working very well so far.
Ignore my messy PVC glue job

Ignore my messy PVC glue job
