The coffee was sold in 47 states and Puerto Rico between July 9 and July 21. Dollar General didn't say how many containers were included in the three lots of coffee that were distributed, or how many were sold before the recall went out.

The discount retailer says it was alerted to the potential problem from a customer. Here's what to know and where it was sold.

Dollar General is voluntarily recalling instant coffee that has the potential to have glass in it. According to a U.S. Food & Drug Administration announcement, Clover Valley Instant Coffee is being recalled after a customer notified Dollar General of the possible issue.