One group is cautioning parents that some baby bottles may be passing toxic chemicals into their child’s food and drink.

A study released by an environmental policy group said new tests at the University of Missouri found that some bottles can leach potentially harmful levels of a toxic chemical called Bishenol A, also called BPA. BPA is used in making polycarbonate plastic food and drink packaging.

The chemical has been linked to developmental, neural and reproductive problems.

Brands tested include Avent, Dr. Brown’s, Evenflo, Gerber and Playtex.

Researchers recommend that parents use glass or plastic bottles that don’t contain that chemical.

Some doctors said more studies are needed.