Double isolation crystal cup material is high borosilicate,Double layer heat insulation design,Not only to keep the temperature of the tea soup, not hot, it is more convenient to drink,Super clear glass,suspension of the double layer design,Glittering and translucent the aesthetic feeling, let your pleasure experience a pleasant drinking,Applicable: Suitable for green tea, black tea, rock tea, fruit & flower tea, all kinds of loose teaSize: 6.5cm * 5.5cm * 4cmInstantaneous temperature: -20-150 degreeMaterial: glassColor: transparentCapacity: 50mlPackage includesd:6* Glass Tea CupsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.