Oak top for fermentation jar

[Astrojimbo]

Want to make a oak top to put into the top of my fermentation jar. Is there any reason to not have oak in contact with fermenting veggies and will it impart a taste or other nasty things? Thanks for guidance Jimbo

[nkbrilley]

I have used oak and it is fine. Only danger with wood is that it swells on contact with wet pickles and can then get stuck.