KAMJOVE Glass Gongfu Press Art Tea CUP Teapot with filter GR-03B 380ml heat-resistant glass Manually Blow-molded Capacity: 380ml Color:Clear Transparent Heat-resistant:-30 degrees - 150 degrees Material: High boron silicon glass Heat resistant glass; Stainless steel. No leaking. Can control strength. High efficiency filtration to ensure making tea. Great for one cup of hot tea!