The Thompson 20oz Stainless Steel Tumbler retains the temperature of your chosen beverage for a prolonged period of time. It comes with a slider lid which is simple to use. It is lightweight and compact and fits into most car cup holders so you can stay refreshed and hydrated no matter what adventure life takes you on. The outer shell of this tumbler is made of stainless steel. The durability of stainless steel will keep this tumbler looking smart for years to come, and the interior plastic