Liquor Guard Cap The inner pad is adopted with PE polystyrene foam, which conforms to the Standard of National Sanitary; it ¡¯s alcohol resistance and maintenance. It¡¯s made by European advanced equipment, the cap surface can be embossing pressed and the cap side can be embossment smoothed or 360¡éXdiverse color printed, to make the surface more clear and elegant, and the product more valuable. The cap guards against stealing and mischief to maintain the sealing.