It's better to be safe than sorry, right? I know there's been a lot of talk lately about Bisphenol A and it's negative effects, especially on babies/toddlers. I hadn't seen a very comprehensive list yet, so I went to REI and got the well-advertised new toxin-free Nalgene sippy cup (and one for me too). So, hopefully we'll be side-effect free (at least from this toxin-producing item). It's hard to avoid everything these days.