Brightea Heat Resistant Ultra Thick Glass Teapot with Stainless Infuser (500ml, 17 fl.oz) Extra thickened glass teapot with stainless steel filter It is made from Borosilicate glass, which tends to be stronger, more durable and more heat resistant than conventional glassware No leaking. Can control strength. High efficiency filtration to ensure making tea. Great for one cup of hot tea! Temperature range: -20 to 150 Capacity: 17 Ounce