20 OZ. Flaver Stainless Steel Travel Mug is made of food-grade and BPA free Stainless Steel with diamond shape design at the lower part of the mug. Clear plastic lid with spill prevention slide lock. Double wall vacuum insulated can keep your drinks hot for up to 4 hours and cold for up to 6 hours. Large capacity coffee mug is perfect for your journey and travels. Rush 3 days available with rush charge upon request. BPA FREE, FDA certified