Let’s pause here to draw attention to the water filter (on the left): it is a very characteristic feature of traditional houses in the Canary Islands and forms part of their ethnographic heritage. 

 Although it is commonly called a ‘distiller’, it does not actually distil the water, but rather filters it and keeps it cool. If we look closely: 

At the top, where the water is poured in, there is a filter made of porous volcanic rock, which cleans the water as it passes through. 

At the bottom: a container collects the filtered water, ready to drink.