That Whiskey is aged in new charred oak barrels for a little while. Then the barrel is cut into pieces and placed with the Whiskey in a special pressurization chamber, that increases and decreases the pressure.
All that technology makes the wood “breath” the distilled spirit in and out. This pressure-finishing process lasts about a week, and mimics the natural, seasonal aging process that normally takes years. What you end up with is a Bourbon that tastes like it is much older than it is.
Cleveland Whiskey was founded in 2014, and sold its first finished bottles just a few months later. And they are selling out and ramping up production.