Kola nut

Kola nuts were edible nuts found on Earth.

At Kumbi Selah, King Tenkamenin offered the Doctor kola nuts and a place to sleep in the Royal Compound. (PROSE: Transit)

Zamina ate a bag of kola nuts while waiting for her Central Line connection at King's Cross. (PROSE: Transit)

The Seventh Doctor had a bag of kola nuts in his pockets. He offered one to Joachim Wolff, who turned it down. (PROSE: Just War)

The Eighth Doctor had a bag of kola nuts in his pockets. (PROSE: The Dying Days)

The Tenth Doctor had a bag of kola nuts in his pockets. (PROSE: The Eyeless)