Are Starbucks Tumblers 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. Do the starbucks tumblers keep drinks cold? It doesn’t sweat and keeps cold drinks cold. Are … Read more