Heat resistant Borosilicate glass, similarly to pyrex type glasses. Fits all Bodum 3 cup French press coffee makers..

NOTE: Beaker capacity sizes are stated in standard 4 oz. coffee cups. Were not sure who in the world drinks a 4 oz. cup of coffee... seems kind of like running downhill with your mouth open... but, nevertheless, thats how they are sized. We strongly recommend checking ounces on the specs listed below to be sure this beaker is the right beaker for you.

These are genuine Bodum Coffee Press Glass Inserts.

Original Bodum press plunger beaker inserts made from Borosilicate glass, similarly to pyrex type glasses. Its the same type of glass used in many optical and chemical applications. Its high thermal and shock resistance along with its low rate of thermal expansion makes it an excellent choice for coffee press beaker applications. The glass remains absolutely neutral, even to aggressive chemicals. Withstands harsh dishwasher cycles much better than other glass materials, without getting scratched. Extremely resistant to water, alkalis, acids, and salt solutions.