We use these.
Boon has some really neat ones that we will probably buy! They are BPA, PVC, and phthalate free. It is called the Boon Groovy and is around $13. I found them on The Soft Landing. I've ordered from there before and would recommend them.
There is also one by Green Sprouts that is a bit more expensive. $16. It is a cornstarch-based non-toxic, eco-friendly plastic.