Every MiiR product sold helps fund transparent giving projects. Every MiiR product comes with a Give Code that allows you to experience the story behind your purchase. Flip. Register. Follow. Chug-style lid has a high flow spout, built-in magnet to keep cap out of the way when in use, and articulated hinge to guide locking cap open and closed. Thermo 3D Double Wall Vacuum Insulation Technology – Keeps your drink hot up to 12 hours and cold for 24 hours.