Alcohol Focus Scotland brought complaints against Quivers, Shot in a Tube, Shoeyz Shots and Shootaz, on the grounds that they contravened Portman’s code by persuading consumers to drink them quickly or down-in-one.
The brands’ packs all contain 2cl of liquid and less than a third of a unit of alcohol.
Portman said its research showed that although such drinks were usually consumed down-in-one, this was because of the small volume of liquid rather than the packaging itself.
Chief executive David Poley said: “The independent complaints panel was persuaded that this style of packaging was not causing harmful drinking.
“You could have 10 of these drinks and still be within the government’s recommended drinking levels.”
The panel did find Shootaz, produced by Tubular Drinks, in breach of the code because of the “energy flavour” description on one of its drinks.