Glass tea infuser fits in the center for loose tea and can be removed for making flower tea. They can be used over and over again to make the perfect pot of tea. Warmer is sold separately. A wire grid is included for use on electric stoves, the grid is not required for gas stoves. It always uses medium or medium high heat in dishwasher and microwave safe. Beautiful glass warmer is used to keep your tea with proper temperature. Votive candle and glass candle holder are included. Company: Yancheng Glassman Arts & Crafts Co., Ltd.