The cup is made of glass, and it is safe and non-toxic. It isportable and easy to carry to school or travel. The cup can be used repeatedly anddurable for long time use. Features: Made of stainless steel and glass, sturdy, safe and healthy. Easy to use, portable and easy to carry to school or travel. Comes with stainless steel filter, which can help you to filter the tea residue, convenient to use. Reusable and durable: the glass cup can be used repeatedly and durable for long time use. Double layer design, the cup is heat-insulated, and it will not scald your hand. Specifications: Condition: 100% Brand New Material: 304 Stainless Steel+ Glass+ PC Color:White, Black, Coffee, Pink(Optional) Height: approx. 21cm/ 8.27in Diameter: approx. 6.5cm/ 2.56in Capacity: 320ml Weight: approx. 393g/ 13.86oz Package List: 1* Glass Cup Note: 1. Please allow 0-2cm error due to themanual measurement. Thanks for your understanding. 2. Monitors are not calibrated same,item color displayed in photos may be showing slightly different from the realobject. Please take the real one as standard.