FantasticTea Borosilicate Crystal Clear Double Wall Glass Teapot with Glass Infuser (600 ml, 2.6 cups, 21 Fl oz) Hand blown borosilicate glass teapot. Double glass wall for keeping tea warm. Borosilicate glass resists heat or cold shock and breakage Includes glass tea filter (tea infuser) for loose teas Capacity: 600 ml, 2.6 cups, 21 Fl oz.