Fruit

Fruits are similar to ship parts and treasures in that they may be collected for continued gameplay or rewards, and they are normally found in specific locations, commonly accompanied by some sort of challenge which must be completed to access them. Some fruits are split into parts, and all parts must be recovered before the fruit is recognized. The fruits are directly useful to explorers, as they need to feed on juice every day to survive. Fruits can also act as treasures if need be for certain games.

Juice
The purpose of fruits serves more than just collection's sake: fruit collected is juiced at the end of the day to provide rations for the explorers. Juice is stored into bottles, and a bottle is only closed and made available if it's filled to the top. For this, the leaders will even mix juices of different fruits, if need be. After everything has been juiced, the crew grabs the oldest bottle and consumes it, regardless of how many people there are to feed on it. As such, the amount of juice the player has will determine the number of days left they can explore. If a day ends and there are no more bottles of juice, the game is over, although the player is allowed to retry from a previous day.

Different fruits provide different amounts of juice, with the lowest possible being half a cup, the maximum being 3, and the average being 1.4. When two different juices are placed on the same bottle, the resulting juice's color will end up as a blend between the two. This is purely aesthetic and affects only the color seen on the bottle.

List
In addition, the following two special types of fruits can be found:

Piktamin U
"Piktamin U" is a vitamin that the Koppaites claim is in some fruits. Oddly, even the Golden Sunseed, which seems to be more of a treasure and less of a food, is said to have a lot of Piktamin U.