Unsafe drinking water | photo: Pierre Holtz - UNICEF, CC-BY-SA.
Cooking generates byproduct of 1.3 L distilled water per person and day at
a cost of $0.07/liter. More distilled water can be generated at a cost of
$0.25/liter.
8-9 times more energy efficient than ordinary distiller (theoretical).
Can be built by a layman in 37 minutes, for material cost of $15.
From upcycled trash and material easy to get worldwide, reuses items
already present in household without modifications – these can be still
normally used.