Idaho Code § 18-5502
Denatured alcohol may be sold, given away, or transferred, in this state by any registered pharmacists, or other person. It shall be unlawful for any person to sell, give away, or transfer, denatured alcohol, preparations or compounds thereof, in any quantity, unless the container from which such denatured alcohol, preparation or compound thereof, is taken and the container in which it is delivered to the purchaser or transferee, has thereon printed in red ink the words "Denatured Alcohol," "Caution," "Poison," the name and address of the vendor or transferor, the percentage strength of grain alcohol in the contents of the container, the names of at least two readily obtainable antidotes, and the words "must not be used externally or internally," and the following caution as required by the United States government:
"Completely denatured alcohol is a violent poison. It can not be applied externally to human or animal tissue without seriously injurious results. It can not be taken internally without inducing blindness and general physical decay, ultimately resulting in death."
Provided nothing herein contained shall prohibit the transfer of denatured alcohol, preparation or compound thereof, direct from a container, labeled as above provided, to the radiator of any motor vehicle for anti-freeze purposes.
Idaho Code § 18-5502