MiiR Stainless Steel Insulated Travel Pint Cup with Lid, 16-Ounce Keeps cold things cold for 24+ hours, and hot things hot for up to 12 hours Double wall vacuum insulated (doesn't sweat) BPA free materials Each Product helps give clean water to one person in need for one year; miir partners with nonprofit organizations that develop water projects 18/8 medical Grade stainless steel