Glass teapot for tea makers. German Schott brand glass. Bottom measurements are 10cm-13cm. It can also be used in different brands and models with the same sole dimensions. Some brands and models tested for compatibility are: Fakir: Tea n more, Chaiwan, Tastea, Teatime Schafer: Optimal, Tea pleasure Sunny: Symphony Emsan: Handy Arzum: Ehlikeyf, JollieTea Philips: HD7304 Grundig: TM4961, CM1020 Beko: CM2940, Teaparty BKK2211 Arçelik: CM3940, K3281, 3280 Tiryaki