I have two 5 liter barrels and two 20 liter barrels made by Oak Barrels Ltd. They are top quality, carefully crafted and charming to look at. None of them have EVER leaked a single drop, even when first filled with water to prepare them. They are being used to age fruit spirits and very quickly impart a beautiful color and smooth mellowness to eau de vie. (I had bought a couple of 20 liter barrels a little cheaper from another company and was exceedingly disappointed. They leaked from the beginning and are now being used as planters in my yard where they are quickly disintegrating!) I will ALWAYS buy any small oak barrels I need from Oak Barrels Ltd.