These straws can cause mouth lacerations.

Starbucks Holiday Cup Causes Online Controversy
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These straws were sold online as well as in Starbuck's locations. There are at least three reports of children incurring "mouth lacerations" while using the straws.

Over 2 million of the straws were sold in the United States, and close to 300,000 were purchased in Canada. According to the company, the straws have a ridge at the bottom that keeps them attached to the lids.

These straws are rigid and people should not let children use them as they can pose an injury risk, says Starbucks.

According to the U.S. Consumer Product Safety Commission, the straws were sold between June 2012 and June 2016.