Crafted of temperature-safe 100% borosilicate glass and available in three sizes, this glass replacement beaker is designed to fit Primula coffee press and French press coffee makers. Borosilicate is a technologically advanced glassware that’s thin and durable, microwave- and dishwasher-safe, and often used for high-quality beverage glassware. Though this borosilicate glass beaker is specifically designed to fit Primula coffee presses, it is also useful as a serving pitcher, mixing vessel for cooking, or even a decorative vase.