The Water Climb weighing scale would likely turn into an impromptu cold shower. I never weigh myself, as I dislike bad news. But if I did, I'd take a look at this concept scale from Jaeyoon Park, Dajeong Kim and Jeong Heo. It's called the Water Climb, and the most complex part it has is Archimedes' principle of displacement.
The scale consists of a box, a bag and a graduated glass tube. You fill the bag with water, place it in the box and attach the tube to a hole in the bag.
Gadget Lab
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