I recently discovered the coolest thing...Chewbeads.
As the website says, it is "nontoxic jewelry for moms, safe for baby to tug, touch, and chew." The beads are made out of silicone just like pacifiers and bottle nipples, and they sell both necklaces and bracelets in a variety of colors and styles. They are BPA-free, dishwasher-safe, and have a breakaway clasp.
It is definitely one of those things that makes you think "why on earth didn't I think of this first?"!
I got one in pink...and I need a couple more colors...are you listening, Santa? I love that I can even wear it to work. (I know it seems weird that I am wearing a sweater in the middle of August...but it is freaking freezing in my office.)
It is also Ava-approved :).