Joja Cola

The Joja Cola is a food item that grants the Well Fed buff when consumed. It has a chance of being fished up instead of a junk item when fishing.

If this item is within a player's inventory near the Dryad, she will comment on it when the player interacts with her. After a few more interactions with the Dryad while holding the item, the player will be prompted to give the Joja Cola to the Dryad. This will trigger a sequence in which a portal will open, allowing the player to peek into the world of Stardew Valley for a few moments. After a few moments pass, an item called a Stardrop will be given to the player. This item will summon the pet Junimo.

Trivia

 * This item is a reference to the item with the same name in the game Stardew Valley.