S.C. Code Ann. § 61-6-4020
A person who is twenty-one years of age or older may transport lawfully acquired alcoholic liquors to and from a place where alcoholic liquors may be lawfully possessed or consumed; but if the cap or seal on the container has been opened or broken, it is unlawful to transport the liquors in a motor vehicle, except in the luggage compartment or cargo area. A person who violates this section is guilty of a misdemeanor and, upon conviction, must be fined not more than one hundred dollars or imprisoned for not more than thirty days.
For purposes of this section, alcoholic liquors means all distilled spirits regardless of the percentage of alcohol by volume that they contain.