Similar to reagent bottles used in chemistry experiments, this product uses a "ground stopper" method, which secures the lid through the friction of ground glass, without using metal fittings or packing. It is aesthetically pleasing, reduces stress when opening and closing, and is also easy to clean as it can be boiled. Please understand the craftsmanship and the characteristics of glass before purchasing. Details Product Name: Heat-resistant glass container Material: Heat-resistant glass Usage: For hot water Heat resistance: 120°C temperature difference Capacity: Approximately 1L (1000ml) Weight: Body: Approximately 570g / Lid: Approximately 160g Size: Opening / Body - Approximately φ6 / Approximately φ11 x 17.5