It is made of Surlyn material that clear look likely crystal, dimension stability and chemical resistance, special it’s able to anti-alcohol. Unlike other plastic materials, it has outstanding stability in contact with perform or alike substance. Besides offered in flint, it can be tinted to other colors for matching the design. The cap is a perfect substitution to glass for it is versatile in forming shapes and in light weight and less likely chipping in handling as glass does, So it’s widely use as caps of  quality perfume bottles.