My first thought was that these could be cut up into large bowls or small dishpans. I should take one of them, fill it with the white air dry clay I bought last week, cover it with a dish towel, and have rising bread on the kitchen counter.
Then, as I was cutting out a bowl, I had an AHA moment. The pieces between the 'bowls' could also be cut out and used as plant pots.
The tall ones could be used at plant pots and the lower ones could be used as low pots for cacti - or serving dishes.