Potions are a check-in and reward system first introduced to the mobile version as part of the December 2016 update. Potions can be either earned or purchased. Typical rewards for opening a Potion include: Coins, Trophies, Mass Boosts, XP Boosts and Skin Pieces.
Currently, there are two main types of Potions: Mystery and Premium. Mystery Potions are earned based on player game performance. Premium Potions must be purchased using the DNA currency.
Potions - Help Information (?)