Stainless steel double walled vacuum insulated • Comes with a clear screw-on lid and straw • Sealed with FDA food-grade approved epoxy. IMPORTANT NOTES: • There is no epoxy on this tumbler making it lighter and more durable. CARE INSTRUCTIONS: •Hand wash only •Not dishwasher safe •Not microwave safe •Do Not soak in water, does not matter if it is hot or cold. •Tumblers are sensitive to extreme temperatures. Do not leave it in the car for extended periods, or in the freezer.