Hand-me-downs save many parents money. Megan Teague's daughter, however, will not pass baby feeding products along to Teague’s second baby.

“I threw a lot of them away,” said Teague.

That's because they contain the BPA. Manufacturers use it because it prevents cracking and shattering but experiments on rats link the chemical to behavioral changes, early puberty and cancer. Baby News owner Jim Carlstrom says parents are responding.

“They want to know what alternatives are out there,” said Carlstrom.

He says more and more parents are looking for that small number 7 on the bottom of bottles, which indicates the product may contain BPA. He says sales of products without it have shot up 50 percent in recent weeks.

“We've sold out of our Born Free products,” he said.

Because not all products that contain BPA have a number 7 on the bottom, Carlstrom says you might want to look for products that say "BPA free."

“I would look for labeling. These companies want to tout the fact that they're BPA free,” he said.

As for those that aren't BPA free, Carlstrom is giving manufacturers a chance to respond to safety concerns. If they don't take steps to make their products safer, he'll take his own steps.

“We will pull them off our shelves,” he said.

BPA-free bottles can cost 10 to 20 percent more than other bottles but you can get a deal on some, like Parent's Choice bottles. They're BPA free and sell for just a few dollars per package.

It will take some time to get BPA-free products off shelves at Wal-Mart and Toys R Us. Both companies say they'll be phased out by the end of the year.