The fancier the folder, the better its rewards!
All folders contain cards and energy drinks, but the amount and rarity of the contents depend on the pack.
Legendary Folders have the best rewards and are a great source of Epic manager cards.
Gold Folder grant a lot of Rare character cards, but they also have a chance of giving Epic manager cards.
You can also collect a free pack every 4 hours, which is a reliable, steady source of energy drinks and managers. Don't forget to claim it whenever ready!