Mont. Code Ann. § 16-6-208
16-6-208 Inference of intoxicating beverage
16-6-208 . Inference of intoxicating beverage. The court trying a case shall, in the absence of proof to the contrary, be at liberty to infer that the alcoholic beverage in question is intoxicating from the fact that a witness described it as intoxicating or by a name which is commonly applied to an intoxicating beverage.