Polar Camel 20 oz Cups Stainless Steel Travel Tumbler Mug features double-wall vacuum insulation with a clear lid. The mug has a narrower bottom to fit most standard cup holders. You would hardly be able to tell the difference between this Polar Camel cup and other popular Tumbler cups. It is 2X heat & cold resistant compared to a normal travel mug and is BPA and lead-free. Keep your drink cold for over 24 hours and keeps fluids hot up to 8 hours! Now with 17 color selections! Not recommended for dishwashers, hand wash only. Images are lasered, and are permanent.