Constructed of FDA compliant materials. Includes a non-skid bottom to provide stability. Features a removable twist handle that can change your travel mug into a tumbler. Wide opening for easy cleaning. Snap closure to keep your beverage from spilling. Vacuum insulated double walled 18-8 Stainless Steel that will keep your beverage hot for hours. Complies with FDA. 4.75" D x 4.75" W x 8.75" H