Walmart is recalling 850,000 water bottles after two people suffered permanent vision loss trying to open them. Customers reported being hit in the face with the lid when opening the Ozark Trail brand stainless steel bottles.

The CPSC and Walmart have issued a voluntary recall notice for consumers to get a full refund and stop using or return the Ozark Trail water bottle immediately.

The lids on the 64-ounce stainless steel bottles can eject and strike consumers, two of whom reported permanent vision loss as a result, safety regulators said.