Had experience w parchment cooking bags? Grocery just started carrying PaperChef brand. Will try w fish, baby zucchini & herbs.

Is there a reason you don't want to just use parchment paper and wrap your own bundles? It's probably a lot less expensive.

I do not like them. The only kind available in my grocery were large, as opposed to individual packet-sizes, and they did not hold up (they broke during cooking), even just with 2 fish fillets and vegs. Much better to make your own individual packets.

You might want to check out some of the fish recipes discussed in this thread! http://food52.com/hotline/7218-good-fish-en-papillote-cooked-in-parchment-recipe