Actually , those bags do not really work that well.
every time you open them , oxygen and perhaps humidity get in them
I just reseal the original bag , as I take out either green beans to roast
or roasted beans to use.
I already had a chamber vac. and chamber vac bags are very cheap.
the breakthrough , if you will , was to realize I could put the original green bags
in the chamber vac bags : saving labeling , spilling the beans all over the ounter
etc.
P.S. : those bags you mention cost more than 15 lbs of green coffee !
Sweet Maria sells these :
https://www.sweetmarias.com/stand-up-pouch-bag-with-valve.html
I used to use them a zillion years ago . sealed and sqeezed out the air.
attractively priced and reuable. better than nothing.
