This is a MUST have item! The 20oz Insulated Classic water bottle was designed with high performance in mind, keeping beverages hot for 20 hours and iced for 50 hours. Crafted from high quality, durable food grade 18/8 stainless steel with a wide 1.75 inch (44mm) opening fits ice, is easy to fill, pour and drink from! Included in this bundle is 1-20 oz Klean Kantean bottle with loop cap as well as 1-Klean Kantean sports bottle cap.