Diameter 15 cm. This glass teapot warmer is suitable for heating and keeping warm a variety of beverages including tea, coffee, chrysanthemum tea, and more. Keeps tea at a steady temperature for longer, helping you enjoy a consistent hot brew without frequent reheating. Compact and space efficient. The small footprint fits easily on tables and countertops. Handmade construction from borosilicate glass with high hardness and low thermal expansion for durable, reliable performance. Compatible with a range of beverages, making it a versatile addition to home, office, or casual gatherings. Use scenarios: - At home on the dining table during breakfast or afternoon tea to maintain warmth. - On an office desk to keep coffee or tea warm through meetings. - During small gatherings or tea sessions to serve guests with consistently warm beverages. Customer support: If you encounter any issues during use, please contact us. We will provide a satisfactory solution within 24 hours.