Are these caps airtight?
1013241
Yes, they are airtight. I shake liquids around in them all the time. These lids aren't for canning purposes, though.
1013242
no, they are not completely air or liquid tight. they work fairly well, though. i am happy with them.
1013243
Airtight. Hmm... I guess that depends on what you mean by airtight. I haven't put anything fermented or effervescent into them, where I might have seen leakage under pressure, but I had a thin liquid (ethyl alcohol, the drinkable kind), and if I just gently shook or inverted the jar, it leaked. If you're just looking to prevent odd tastes from getting into something you have in the fridge, for example, they're probably fine. But they are definitely not for preserving or canning.
1013244
Theyl're not as tight as the metal lids. I like them because I can label the lids with dry erase markers.
1013245
If fully screwed onto the jar, they are as airtight. They are not, of course, as airtight as something that is canned using rings/lids but for basic storage of dry goods or wet goods in the refrigerator they'll keep food fresh for quite a while. We use them as lids for things such as salsa and jam once opened and placed in the refrigerator. The salsa/jam lasts at least a week without any issue. Dry goods will store much longer, obviously.
1013246
I don't think the large ones are as airtight as someone would like, and when I say someone, I mean someone who lacto-ferments and all that. Might be better off with a pickling jar.
1013247
I'm not really sure what you mean by airtight. It doesn't seal like a canning process does, but it keeps the contents of the jar fresh and I often shake mine without leakage as I use it to store smoothies after I make a large carafe and can't drink it all. Hope that helps.
1155171
Hard to say. They aren't sealed so it's possible. They have the usual plastic cap on them.
1822490
They are air tight. I use them to store yeast and have never had a problem.
1635191
Not 100% airtight but very closely sealed. I keep my coffee and sugar in each and they stay fresh - no problem.
1319653
Sad to say, they are not airtight. My pantry got overrun by moths and grubs inside these jars. I would not put anything like rice, flour, pasta, beans or anything else that can be eaten by moths. I had better results with OXO, Click N' Lock or PERSIK for storing food.
923207
No they are not. If you use your spice constantly like I do you don't have to worry about them being air tight. My spices get used before they go stale.
2055147
They are only airtight in the foil pak they come in. But they are indivisually wrapped tightly in a non-airtight plastic wrapper. You would have to put each in an airtight bag/container to prevent them from becoming soggy.
664641
I don't dsee why not. They have the regular canning seal caps. Seem they would be airtight. I believe these are the same design as any of their "canning" jars except that they are pretty light blue instead of clear glass.
263238
They are not airtight, but I have never had an issue with any of the prescription meds or supplements degrading over a weeks' time. I have been very happy with this product.
1124113
I would say yes, as you have to fill them in an upright position - I use a freezer safe cup, or the fluid will leak out around the cap, before the are frozen.
1974047
The lid on mine seals very tightly. They are definitely "air-tight". I have not tested it in water, but I would assume that yes, they are. Hope that helps :)
889238
Yes. They are airtight. I use them for juicing all the time. But I wouldn't store fresh juices for more than 24-36 hours. They lose a lot of their fresh made taste. I have done it a couple times and was sorely disappointed with the juice after 24 hours of storage in the fridge.
1826841
THEY ARE NOT AIRTIGHT!!!!Good for crafts or buttons I guess?The plastic seal between the metal cap and the jar is not designed to be airtight seal.
141595
I believe they are. I've cleaned them before using desinfectant spray and water and it's still holding up. The seals seem air tight but you may want to ask the manufacturer (Bright Medic) directly to be sure.
129415
They are very well made and seal tightly. I'm not sure they are air tight, but they are leak proof.
572331
No, they are solid with no removeable parts. They do not have a seal. I love these caps!!
226188
Not really. They keep air out. They will not keep pressure in the container-it will go flat