Rabbit Hole Boxergrail Rye Whiskey Unlike our other expressions, the mash for Boxergrail only contains two grains: rye and malted barley. Rye takes up a majority of the mash with the malted barley acting as a “flavoring grain” - giving our whiskey a velvety mouthfeel. We brew the mash using our signature cooking process, giving us the most flavorful base possible. We run the mash through our handcrafted, one of a kind Vendome Copper still and proof it with Kentucky’s Limestone abundant water before barreling. We mature Boxergrail in hand-selected American White Oak barrels from Kelvin Cooperage. To ensure all of our love and care in the whiskey-making process shows in the finished product, we forgo chill filtering.