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变色桶 / Color barrel


The barrels water which use to the drinking machine also has the expiration date.If the water in the barrels is placed for a long time,it will allow bacteria to multiply and effect the quality of water,then makes water do harm to people’s health.
Color barrels will change color to help people judge the quality of water.
Bacteria’s metabolism will consume oxygen and produce carbon.And carbon dioxide dissolved in water will make the water is weak acidity.
The recess of barrels is made of special materials,it can check the acidity of water and change color.



Ningbo city, zhejiang province, China



Ningbo city, zhejiang province, China

Lu Liu Hui Shen Ri Yu Liu