No.

According to Zhihu.com, laundry detergent cannot be used without a cap. The volatile substances in the laundry detergent often have a strong smell. If the cap is not fastened for a long time, these volatile substances in the laundry detergent will It will gradually evaporate with the flow of air, which will not only shorten the service life of the laundry detergent, but also have a certain impact on human health.