Check this list to see if they are BPA free

http://safemama.com/2007/11/22/bpa-free-bottle-and-sippy-cup-cheat-sheet/print/

The Soft Landing blog (look in my links) has more information as well.

If they are not BPA free, you can return them to Babies R Us for an equivalent product exchange that is indeed BPA free.  All of ours are going back tomorrow.

Why does it matter, you ask?  Well…the safemama.com website says it best:

• What is BPA? BPA or Bisphenol-a is a chemical used mostly in polycarbonate plastics (PC), which are used in: baby bottles, sippy cups, sports bottles, canned food / formula lining, and jar food lids. Greeeat. (feel my thick sarcasm?)
• How do I know if something is made with PC? Flip the item over and look for a recycling symbol on the bottom. It looks like a triangle of arrows with a number between 1 - 7 in the center. Polycarbonate plastic is usually marked with a 7. It might sometimes have a PC next to it indicating polycarbonate.
• 
• Why should I avoid BPA? Bisphenol-a is a known endocrine disruptor. Meaning it has estrogenic properties which, in recent animal tests has shown to cause a bevy of health problems such as;
  • precancerous tumors
  • uro-genital abnormalities in male babies,
  • a decline in semen quality in males,
  • early onset of puberty in females,

Research is showing that when plastic containers, mostly those used to hold liquids and foods, are leeching Bisphenol into the foods and liquids they are holding. Heating food and liquids with these plastics is shown to increase the leeching of this contaminate. Bottom line: It’s icky and if you don’t want to chance it on your precious kids, there are ways to avoid it.