It may seem odd that a Homebrewer wants to do this, but my last batch didn't go to plan and then my wife decided to invite our friends round for a BBQ this coming Saturday. I'd prefer to have something on tap even if it is a commercial lager.
Therefore, my question is what are my method options for filling the corny keg with say 5 to 8 litres of commercial lager. Can I start with a 5L party keg for example?
I have a counter pressure bottle filler I made, which might be able to be used in reverse some how? who knows?
I'm hoping someone here can help.
EDIT: I'm really looking for a way to get a small amount of beer into the corny the day before it will all be consumed. So commercial keg is too much and too expensive really, hence this post.