Walmart is recalling about 850,000 stainless steel water bottles because the lid can “forcefully eject” and unexpectedly strike consumers — resulting in permanent vision loss for two people to date.

Walmart has issued a recall for 850,000 metal water bottles after two customers suffered permanent vision loss from faulty lids forcefully ejecting in their faces, according to a July 10 U.S. Consumer Product Safety Commission (CPSC) notice.

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.