Amado 30 OZ Tumbler, Vacuum Tumbler Stainless Steel Vacuum Tumbler This is a 30 oz tumbler. It is made of highest food grade material, no heavy metal and 18/8 stainless steel. This vacuum tumbler can be put on the most cup holder of vehicle. It fits the 30 oz tumbler. This 30 oz tumbler cup keep warm more than 24 hours, keep cold more than 48 hours. Attractive design, comfortable to hold, more durable, easy gripping, heat protection, dishwasher safe, handle and capable of drinking Lifetime Guarantee: We are so sure that you will love Amado 30 oz tumbler, any quality problem, we guarantee you a lifetime warranty.