Klean Kanteen 20oz Classic Vacuum Insulated Stainless Steel Water Bottles (w/Loop Cap) 2 Pack Combo Set Large 1.75" (44mm) opening fits ice, easy filling and pouring Electropolished interior doesn't retain or impart flavors Durable, double wall construction keeps contents hot 12 hours, or iced 24 hours Portable, reusable, and recyclable. BPA Free. Klean Kanteen 20oz Classic Vacuum Insulated Stainless Steel Water Bottles (w/Loop Cap) 2 Pack - shale black and beet root