Just made a quick bag for my barbecue skewers. I got some new (to me) fabric I'm testing out: a 300d polyester (coated on one side). It's called Odyssey and is from the same company that makes the acrylic-coated poly that I use for my bag liners. This is lighter and has a nicer hand feel. If it holds up well, I look forward to using it more. You can get it from Rochford.
I like to put my male snaps on a bridge so you can close the snap without putting pressure on the bag. (I used a piece of leather here.) I see so many designs where you have to press into the bag to close the flap. That's not good for your Twinkies.