Are these Sippy Cups safe?

[Kungjo]

With all the info out there about which plastics are safer for you and such, I try to be more careful about what containers I use. I saw these sippys at the store and they didn't have a recycle symbol on it at the bottom of the cup. Just wondering if anyone knows if these are considered "safe" plastic sippys. They are made by The First Years.

http://www.amazon.com/First-Years-Princess-Insulated-Cup/dp/B0009MASHO/ref=pd_sim_ba_img_2

Can anyone tell me if these are okay? If not, then what would you recommend? Anything with Princesses on it would make the transition easier as we're on a princess kick lately. :)

Thanks,

[kijip]

Here is some info on the different kinds of plastics:

http://www.care2.com/greenliving/which-plastics-are-safe.html

I don't know about the cups you linked too.

We are started using metal type bottles, like to ones at this link:

http://www.reusablebags.com/store/reusable-bottles-c-19.html?osCsid=f0aa8e91843b80da726c6d8e1b8c576d

[Kungjo]

I do have Klean Kanteens to use, but was looking for a safe plastic alternative too since the Klean Kanteens tend to dent easily when dropped.

[octmom]

According to this site, they are BPA free.
http://zrecs.blogspot.com/2007/11/z-report-bpa-first-years.html

We have a whole bunch-- Elmo, Cars, and Princesses. The best part about them is that there is not a separate valve. DH never put cups with valves together correctly and we always had leaks.