I use these on most weekend trips. I usually cut the top with my scissors because when you tear open ,the zipper has failed me a few times.
I use my SP 600 mug and just a touch under 2 cups of water does the trick.
They are not bad but it ain't gourmet either!
In my area there are coupons in the Sunday paper for these pretty regular. I have gotten them for $.60-.75 several times.