Xylophone pitcher

How to determine how much water is left in an opaque jug? It is possible on the weight, and it is possible as it is proposed by the artist Mac Funamizu with the help of a metal handle and an “embedded” wooden hammer. The more water in the jug, the higher the sound will be.



Yes, the option “make the pitcher transparent” is not suitable, because this concept is intended for the blind.





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via tuvie.com