Garcinia humilis, known commonly as achachairú or achacha, is a small, prolifically fruiting tree related to the mangosteen.

It grows in the southern part of the Amazon basin in the central area of Bolivia and is cultivated in northern Australia.

The rather tough, bitter rind can be split open with a knife or with the teeth, and the edible part of the fruit consumed with the seed.

The Queensland Department of Agriculture, Fisheries and Forestry has found that the fruit keeps well for four to six weeks as long as it stays out of the fridge.

Once pureed and then strained to remove all of the solids, this liquid may be diluted and sweetened to one's taste, then chilled for a refreshing summer drink.