MiiR gives 3% of revenue to trackable giving projects. Every MiiR product comes with a Give Code that allows you to experience the story behind your purchase. Make your campfire memories a little warmer with a modern take on Grandpa’s old camp cup. Use it for your coffee, tea or your favorite drink you want to keep hot or cold. Thermo 3D™ Double Wall Vacuum Insulation Technology. 18/8 medical grade stainless steel doesn’t transfer flavor or leave you with a metal aftertaste in your mouth.