What Are Starbucks Metal Tumblers Made Of?
Is it insulated? The starbucks stainless steel tumbler has a double-walls of stainless steel 18-8 to keep your drinks hot or cold for hours. This is possible because of the tumbler is vacuum insulated, which is responsible for the temperature retention. What metal are tumblers made of? Rarely seen for drinkware. Basically, cheap stainless steel … Read more