While doing other stuff, I experimented with fake barrel ageing booze using my ultrasonic cleaner.

Using this method, you can give a barrel/wood taste to your liquids.

I used a Whisky barrel piece to give a nicer/better taste to generic Vodka.

Next to do, other woods and spirits. Like Cognac woodbarrel and plain white Rum.

Look at the colour change!
It smelled better, and the taste was great.
Smooth, round and far less harsh as the plain Vodka.