I don't recommend them because they splinter easily and I've heard of chins getting pieces of them stuck in their mouth... I'd go for a plain old stick!
I had one who chewed on a bunny bite-a carrot shaped popcicle stick, she almost choked to death. She was very lucky she was at work with me and the vet was only 10 min away.
Kelly, I agree with the popsicle sticks ban, I got stabbed really bad by one of the splinters just cleaning them up once, and that was a revelation to me. I never gave them again after that, I didn't want it to happen to one of my girls.