Another scourer chewer...
Pepper pinches them from the cupboard under the sink and generally the first I know is when I see him in the garden surrounded by bits of yellow and green. He also just chews and spits, I think he must like the texture and ease of destruction.
I'm not quite sure how he gets them, he must be like speed lightning when I am getting something else out of the cupboard!
His other favourite is plastic flower pots and I have lost count of the number I have had to throw away as they are unusable when I eventually get them off him...