A person can reportedly survive up to six weeks on tsamma melon alone — its pale flesh is over 90% water, and for the San it was historically the only source of water for months of the dry season.
This small, pale-fleshed wild relative of the watermelon grows low along sandy Kalahari soil; its flesh is eaten raw for hydration, its leaves cooked as a vegetable, and its black seeds roasted or pressed for oil.