A report by CNN said the Food And Drug Administration has warned lunch box makers to look for a manufacturing technique that does not use lead, which can cause learning disabilities and behavioral problems.

The FDA issued the call after a study found that soft lunch boxes available in the market may be lined with a vinyl containing lead. Although officials say the lead content does not pose immediate danger.

Mitchell Cheeseman, association director of the FDA's Office of Food Additive Safety said that since food stored in lunch boxes are usually stored inside plastic bags, the potential for lead contamination is minimized.

But Cheeseman warned that if they can ascertain lead is migrating from the box lining into the food, then FDA will have to order a stop into the production of said products.

On Thursday, the FDA sent a letter to lunch box manufacturers and suppliers quoting a study made by the Consumer Product Safety Commission about the lead content in some lunch box linings.