A fruit, nut or seed?
Coconut is even used in the Brita Water filter cartridges, as mentioned on their website:
https://www.brita.co.uk/water-filter-system/water-filter-jugs
Coconut is even used in the Brita Water filter cartridges, as mentioned on their website:
https://www.brita.co.uk/water-filter-system/water-filter-jugs