The BUBBLE & BLING Stainless Steel Double Walled Tumbler, adorned with crystals, is designed for both hot and cold beverages. This travel tumbler features a certified "food proof lid" with a slider vent for a straw, holds 20 ounces, and maintains the temperature of your drink for hours. It is sized to fit most car holders. Care instructions: hand wash only and do not microwave. Important Warning: Keep the vent open until the hot liquid has cooled down before sealing. Since the liquid remains hot for hours, exercise caution to avoid spills while transporting.