Hi,
I have noticed that everyone I know in these circles keeps their spirits, liqueurs etc in 5 litre demijohns. Whilst this is practical for spirits only I find them very inconvenient when you want to handle oak chips or fruit pieces for liqueur making. I now use 5 litre preserving jars nearly exclusively. They are easy to clean inside ( you can actually get your hands inside) and anything like oak chips or fruit is just as easy to get in and to empty out.
Good quality Italian made 5 litre jars are only a little more than demijohns and the spirits do not come into contact with the rubber seal, which is of the highest food standard quality.