Double Layer Glass Mug coffee,milk, tea mug cup 1,eco-friendly, ... resistant 2,easy to clean,reusable 3,oem can accept Double Layer Glass Mug Product description:1,Material is borosilciate glass ,which ... 65mm 70mm 78mm 90mm.7,filter: tea filter inside with four springs to regulate the degree or lightnessShow product: Double Layer Glass Mug