Klean Kanteen 12oz Classic Vacuum Insulated Stainless Steel Bottle (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 12oz Classic Vacuum Insulated Stainless Steel Bottle (w/Loop Cap) 2 Pack - brushed stainless and beet root