The seller has a 30 day guarantee as far as holding liquids goes. He does also include an "instruction sheet" on how to use/care for the barrel. I thought about a water/whisky mixture while making sure the staves seal up properly. Like I said, it will be a work in progress with LOTS of reading before I use it for beer. I will probably only use it for really BIG beers. I've got a RIS coming up at some point.