The RDP Insulated Tumbler - 20 oz.

Stainless Steel Ring neck Vacuum Insulated Tumbler w/Clear Lid.  Features double-wall vacuum insulation.

Maximum cold and heat retention .

The mug has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumbler. 

Polar Camels are made from 18/8 gauge stainless steel - also known as Type 304 Food Grade.