Huswell Insulated Double Wall Glass Coffee Travel Tumbler, 10 oz. Dual walled borosilicate material is designed to maintain hot or cold beverage optimal temperature Gap between layers ensures you can handle hot drinks safely without any risk of injury Unlike plastic portable mugs, this contains no harmful chemicals that can leach into your drinks Dishwasher-safe, Eco-friendly, reusable glasses help reduce waste & helps save you money Large 10 oz. (300 ml.) traveling mug fits most car cup holders & has silicone leak-proof lid & grip