I came across this on a search:
Manhattan Toy Winkel: Colorful loops made from soft, pliable BPA-free plastic, are easy to grasp and hold, plus it can be refrigerated it for a soothing teether!. . Ages 0+
Also, there is nothing listed on healthystuff.org for that toy, so it seems to be 100% safe :) I got one for my granddaughter.
We got the Winkel for our grandson when he was about 4 months old and he enjoyed it a lot for a few months. Now that he's 8 months, he only reaches for it when he wants something to gnaw on (great for teething!) but he doesn't really "play" with it anymore. His favorite early toy is still the Baby Einstein Take Along Tunes. He consistently goes right to this toy whenever he's on the floor or grabs for it on the changing table. He did like the Clack and Slide for awhile, but seems to be already outgrowing it now. Newest favorite toy is quickly becoming our iPads and iPhones. So I guess he's already a tech-a-holic type kid! Good luck finding the best toys for your little one, and hope this helps you!
There is a tiny little rattle inside. I can't tell if its supposed to rattle all the time... It only makes a slight noise if I shake it. Our daughter rarely shakes it hard enough. The best part is that their tiny little fingers can grip on the little colored rings!!
I have the original (which we're really happy with) so I can't speak to the other two, but they look lighter to me- if your baby isn't sitting up yet it might work out with a lighter toy so it doesn't constantly end up on their face