By put the lid float on the liquid surface soy sauce、 soy sauce、 which can reduce the area of soy sauce exposure to air、 to keep the freshness of soy sauce.
With buttons to be able to give small portions.
Through the use in conjunction with soy sauce bottle as Motto Zu as it is opened、 to capitalize save more features.
By preventing a lid floating soy sauce liquid surface、 will be difficult to reduce the oxidized area exposed to air.
Color becomes dark soy sauce and oxidation、 (darker as the value is small) it is possible to measure the freshness by examining the chromaticity. Direction which has float lid by looking at the third party has a higher number of chromaticity.

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