The Buffalo Trace Distillery is best known for making bourbons but has also gotten involved in vodka production. Rain vodka is made exclusively from white corn (corn being a key ingredient in bourbon production and something Buffalo Trace knows a lot about). It undergoes an extensive 20-day production technique that includes cold-water sweet mash fermentation, seven distinct distillations and a polishing stage that adds pure limestone water.” Rain Cucumber vodka appears to have replaced the original cucumber/lime flavor and is offered in a very light proof for what they call a “refreshing riff on a Martini.”