Jack Johnson has partnered with Klean Kanteen to raise awareness and support plastic free initiatives, by creating this 20 Oz insulated thermos. This thermos is the best stainless steel coffee mug solution for hot coffee, cold brew, tea, water and more. Constructed with high quality stainless steel and rigorously tested double-wall vacuum insulation, the 20 Oz Insulated Wide will keep drinks hot for 10 hours and iced for 30 hours.