I agree; they're great. Especially with stir fry, you can really crank up the heat and
not have any issues but
sadly,
I had to give all of mine away a few years back. Just too heavy for these
carpal tunnel hands to use any longer. But they're great.

I love mine. They work great. They seem to work better if you don't twist/seal
the end closed; give some "breathing" room.
It keeps celery (for instance) crisp for a few weeks. The one thing I did notice
though, after a period of time-after a week or more, everything still looks good,
and it's not rotten, but the taste becomes dimished. I'll buy more when I can.
Just wash them out, and let them air dry completely before adding more veggies
to the sack.