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Why can t you microwave starbucks cups?

Best Answers

If you have a liquid in a container that is microwave-safe, then the increased speed molecules experience will result in heating this liquid . If the container is not microwave-safe, then maybe the glue component when making the coffee cup contains water or if you have ink that has metal in it printed on the cup or on some dinner plates etc. read more

Starbucks cups have a metal ring at the bottom connecting the base to the walls of the cup. This is to stabilize the cup when there is a hot liquid in it as the cup gets flimsy when heated. Don't microwave a Starbucks cup. Ever. read more

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4 Starbucks Barrel Coffee Mugs – Microwave & Dishwasher Safe
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