J.P. Wiser's Whisky by 60%, reducing waste water contaminant by 90% and reducing overall energy consumption by 40%. J.P. Wiser had high standards for his signature product, aiming to refine the process for making Canadian whisky and raise above the impure and under-aged whiskies of the time. He soon became known for being blended with exacting care and aged to perfection in white oak barrels. Canada's Food and Drugs Act requires whisky labeled as "Canadian Whisky" be mashed, distilled and aged three years in wooden casks of less than 700 L. Due to the openness of this definition, a Master Blender is free
Single malt whisky more are not uncommon. During the time it spends in the wood, a significant percentage of each cask's content will evaporate. The lost product is known as the angel's share. The selection of casks can affect the character of the final whisky. Outside of the United States, the most common practice is to reuse casks that previously contained American whiskey, as US law requires several types of distilled spirits to be aged in new oak casks. To ensure continuity of supply of used oak casks some Scottish distilling groups own oak forests in the US and rent the new barrels