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. The Travel Tumbler keeps your morning coffee or tea hot or cold longer. This Travel Tumbler won't sweat or be hot to touch no matter the temperature of your drink. 18/8 medical grade stainless steel doesn't transfer flavor or leave you with a metal aftertaste in your mouth.