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This is an improvement design of the ordinary oil bottle cap. Oil bottle cap is being used repeatedly in our daily life,the ordinary caps waste a lot of time due to the need of turning over and over again and the cap is easily lost, the advantage of K - cap is not unscrewing the oil cap, so that they will save some material and the user's time. We can save the trouble of finding it all the time . Besides, it is convenient and easy to use.