Heat Resistant Borosilicate Glass Origami Style Glass Cup 350ML Made of durable material Borosilicate glass. With higher safety, it can withstand -20 to 180 degrees. Can be placed in the dishwasher, microwave oven or refrigerator. Easily removed for cleaning. The cup is made of borosilicate glass that is resistant to thermal shock and does not absorb any odors, chemicals or residues. Suitable for hot or cold drinks