This glass cruet displays an appealing functionalism reminiscent of laboratory glass. The similarity is more than visual: its made of German borosilicate glass, which was originally developed in the late 1800s for scientific uses. Borosilicate glass is created by adding the natural element boron to the traditional glassmaking components of silicate sand, soda, and ground lime. The resulting glass is highly heat, chemical, and thermal shock resistant. The simple hourglass shape is completed by a glass pourer; the clear glass allows you to enjoy the color of the contents within. Dishwasher and microwave safe.