Supa Yum! was a beverage brand before the Great War.
According to the label, it is fruit-flavored. It is not mentioned as frequently as Nuka-Cola or Sunset Sarsaparilla. Supa Yum! bottles can be seen in the form of Hydra, a chem that uses the bottles as a component in its crafting.
Supa Yum! bottles appear only in Fallout: New Vegas.