Just bought a bunch of stuff from these guys. Bought two bags worth of the 500cc O2 absorbers, and they were vacuum sealed, with 'turkey popper" sensors to let me know they haven't been exposed to oxygen. they have my business from now on.I also recommend https://www.usaemergencysupply.com/e..._equipment.htm .
I used them the last time I ordered mylar and O2's, and they sent TWO sealed bags of 500 cc O2's,(50 each) for about $2 more than the other guys sell a single bag. Can't beat that with a stick.:thumb: