A recall is underway for certain Topo Chico Mineral Water bottles because they may potentially be contaminated with bacteria, according to Coca-Cola.

Coca-Cola has issued a recall for certain 16.9-ounce glass bottles of Topo Chico Mineral Water sold at Costco and Sam’s Club locations.

Concern that some Topo Chico bottles may contain more than just minerals has prompted Coca-Cola to issue a recall following the discovery of bacteria that could pose health risks to individuals with weakened immune systems.