You might want to check out the Ratsack.
About a week ago, I had posted a question about RatSack vs. the URSack.
My concern was that animals with sharp teeth might cut through the URSack.
Bonus is that the Ratsack is lighter, bigger, cheaper than the URSack.
(I do want to get an URSack, but I am holding out in the event that they get their approval back...maybe a redesign)
I opted for the 6 oz Ratsack for $30 and I think that it is almost twice the volume of the URSack.
Once I get some time using it, I will post up some sort of review.
Hope that this helps you.