Aladdin's traditional insulated ware features traditional styling and tough, double-walled molded plastic. The fully foam insulated (not air void) insulation helps keep foods hotter or colder longer. Its styling, sleek lines, and designer colors have made this product a tradition in many healthcare settings. The mugs have a contoured lip design that is shaped to make drinking easy. They have a full three-finger grip for improved stability and comfort. The lid is outer fitting to keep the liquid on the inside.