Thanks to the glass strainer, you can brew your herbal teas in your glass. After the brewing process is completed, the strainer part can be easily removed and it is ready to drink. Borosilicate glasses are resistant to high temperature differences and chemical effects. It can be used in the dishwasher and freezer. It does not contain heavy metals, lead-cadmium. It is a material that is considered 100% natural and recyclable. It is suitable for contact with food.