Zip Bag for Dry Hop

[Motorbikeman]

Seen these in Tesco for E1.50 each.

Thought they might be good for something. 

Gave one a good 10min boil to test the zip . The boil temp  did not effect it all.   

Holes in the bag seem a little large  so I would think it would be no good for pellets , but for leaf hops it seems perfect. 

Any thoughts?   For 1.50 its a bargain really.    Near the pet food in Naas Extra.