Very disappointed
They either suck up oxygen too fast, or are not a very effective product.  Being quick to putting them into the dry food canning jars for storage before use, exposes them to too much oxygen to the point of not working right when you are ready to use them (even if it takes only seconds to do the whole process).<br /><br />But, a couple weeks after transferring the packets to the dry goods jars, the seal would hold for only a couple of weeks. The lids and jars are still good (most are new), so I doubt it is from my supplies.  The rims were clean, too.  I even doubled up on packets.  They would make a seal for a week or two, and eventually lose it.<br /><br />Yes.  After opening the new package, I immediately dumped them into a jar and had it seal so they wouldn't passively absorb oxygen (no time was wasted, and took seconds to move it over).  The indicator was very quick to turn blue (litterally only had it in the open air for a couple seconds). I only open the container when I  was ready and had help to make the transfer go fast... and still the poor results for jars with food.
Rating: 1 stars