Insulated sports water bottle: Goodbye sweat! The double wall insulation makes the Iron Flask sweat-free! It keeps your drink Cold for up to 24 hours, and Hot for up to 12 hours. 3 LIDS: Iron Flask comes with three different 100% leak proof lids. Carabiner Straw Lid with 2 Straws, Flip Lid, and a Stainless Steel Lid!It will never leave a metal taste or rust. It assures that you stand out with a very durable and elegant bottle. Our logo is now LASER ENGRAVED to assure the highest quality.