Restaurants have relied heavily on takeout orders to survive during the pandemic, which has caused a need for more ketchup packets.
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But once those started running low, some eateries began pouring out bulk ketchup into individual cups.
The Wall Street Journal reports that low inventory of ketchup is hitting mom-and-pop restaurants as well as chains like Texas Roadhouse.
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According to the restaurant-business platform "Plate IQ," the ketchup shortage has caused packet prices to rise 13% since January 2020.
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USA Today reports that Heinz is working to increase its supplies in order to produce 12 billion packets a year.
-- CNN contributed to this report.