I found these at Kroger!
They're made from recycled yogurt cups, are BPA free and come in a Business Reply Mail pack so after three months of use, you can send them back and they'll be recycled AGAIN to make plastic lumber for picnic tables and park benches. Nothing wasted, everything gained. I love that!!
Here's the link. Check 'em out!! Mine were on sale for $2.50 but I think they're normally around $3 each.