New York (CNN Business) Environmentally conscious coffee lovers who bring their own mugs to buy fresh java at Starbucks will have to settle for paper cups for a while.

Starbucks SBUX on Wednesday announced it is temporarily suspending the use of personal cups and tumblers at its stores around the world to help prevent the spread of coronavirus

The company will continue to honor its 10-cent discount for anyone who brings in a personal cup or tumbler for coffee, even though customers can't use them, said Rossann Williams, Starbucks' president of company-operated businesses in the United States and Canada.

"We are optimistic this will be a temporary situation," Williams said in an open letter posted on the company's website.

Interior of Starbucks Coffee with customers standing at the counter behind reusable cups sign.

Although initially a North American ban, Starbucks announced Friday that it would stop personal mug internationally as well.

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