What's the name of the disposable bathtub bag?

The disposable bag of this device is called "disposable bathtub bag".

The name of disposable bathtub bag is called "disposable bathtub bag" or "disposable bathtub cover" The original intention of this product is to facilitate people to enjoy a comfortable bathing experience in a strange environment when traveling or staying in a hotel, without worrying about the hygiene of the bathtub. Used for isolation and protection of bathtub before and after use to prevent pollution and bacterial growth.