Zip close plastic bags (Shipley, BD18)

I have approx 20 press / zip close plastic bags, 22 x 24 cm, we buy chews for the foxes in them, I have kept them because I thought they might be useful for something ! I think they might be ok for anybody who buys dog biscuits in bulk. If you have a purpose for them please let me know. I am putting them in the recycling at the end of the week, be quick if you can use them.