Features1Borosilicate Glass: This bottle is made of borosilicate glass, suitable for boiled water and ice water, and can withstand the rapid temperature difference of 20 to +100 . It does not crack when cold and hot alternate, and does not contain bisphenol A. 2Features: This double layer water bottle is beautiful in appearance, durable, lead free, without odor, stain free, clean and safe to use. 3Stainless Steel Filter: This tea cup has stainless steel filter, fine distribution of tea mesh, fast tea separation, tea residue filtration and it is durable. 4Silicone Sealing Ring: The glass bottle has strong sealing property and is leakproof. The built in silicone sealing ring can effectively prevent water leakage. 5Double Layer: The cup has a two layer design, which is heat insulated and scald resistant, and has a glossy surface. It is an ideal choice for storing water, beverages, and tea making.SpecificationItem Type: Tea Water Separation CupMaterial: High borosilicate glass and 304 stainless steelGross Weight: 300g/10.6ozSize: 18X7cm/7.1X2.8inProduct Specification: 280mlPackage List1 xTea Water Separation Cup