Teabox Minerva Glass Tea Cup Set, 2.7 Oz, Set of 4 ABOUT : The double walled design insulates the tea while being comfortable to hold. Simple yet edgy, sample teas in style with these elegant, clear glass tea cups. PRODUCT SPECIFICATIONS : Light weight cup with a comfortable grip.Temperature Range: -20 C to 150 C. USAGE: Heat-resistant, double-walled design.Dishwasher and Refrigerator Safe. This is Not Microwave Safe. ABOUT TEABOX: Teabox is on a Mission to Ensure that Every Cup of Tea Consumed in the World is Fresh. That is Why We have Revolutionized How Tea Comes to You. We Source Direct from Over 150 Estates Across India and Nepal. The Finest Teas Come to Us Often Within a Few Hours of Production. So, Whether You Enjoy a Single Estate Tea or One of Our Signature Blends Only Teabox Can Deliver the Freshest Cup of Tea.