S.C. Code Ann. § 12-21-1840
A person who uses in South Carolina a powder or base other than a syrup in the manufacture of a soft drink for sale shall pay a license tax on each package or container of the powder or base in an amount equal to sixteen cents for each gallon of soft drink that is customarily manufactured from the contents of each package or container of powder or base.
The provisions of this section do not apply to a powder or base that is used by a bottler in the manufacture of a bottled soft drink and the Department of Revenue may by regulation provide for the storage of the powder or base when it is not for use in the manufacture of soft drinks for sale. The provisions of this section do not apply to a powder or base that is used in preparing coffee, tea, cocoa, chocolate, any frozen concentrate, or freeze-dried concentrate to which only water is added to produce a pure vegetable or fruit juice nor shall these provisions apply to syrup donated to the Department of Parks, Recreation and Tourism for free distribution at welcome stations.