thanolConcentration is a dataset of raw spectra of water-and-ethanol solutions in 44 distinct, real whisky bottles~\cite{large2018detecting}. The concentrations of ethanol are 35\%, 38\%, 40\%, and 45\%. The minimum legal alcohol limit for Scotch Whisky is 40\%, and many whiskies do maintain this alcohol concentration. Producers are required to ensure that the contents of their spirits contain alcohol concentrations that are tightly bound to what is reported on the labelling. The classification problem is to determine the alcohol concentration of a sample contained within an arbitrary bottle