Are these jars able to withstand extreme temps? I plan on storing breast milk in them (freezer, hot water).
1096063
These jars are marketed as canning jars, so they should be able to withstand extreme heat. I do not think you could use them from frozen to heat without thawing first, but I think freezing should be OK too. Just be careful of the temperature transition.
1096064
I freeze baby food in them and then put in the microwave so I would say yes. I wouldn't advise boiling them though however. For breastmilk....the bags actually work better as you can lay them flat. That's what I used and it worked great.
621730
yes they can ,My daughter used them when she had twins,she didn`t freeze the milk,but stored in the refrigerator.
683859
I am using them in my Freezer. Works great! I believe they have a max temp - hot and cold.
960405
These are very good a storing dry goods. Since the lids are watertight they hold in the product's freshness very well. As will any dry goods though, make sure that you eliminate as much oxygen as possible. Adding oxygen absorbers and/or flushing the container with nitrogen is recommended.
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.
2052867
I could have my friend in Japan read the packaging for me, but I'd guess that depends on how hot your cycles go and if you could get the little lids to prop open right in your utensil basket. It says they withstand temperatures from -4f to 158f (-20c to 70c). I didn't worry about it since I just washed them out when I got home.
1865056
Personally, I would say, no. They just don't "look" like they would withstand the heat. I use them for my homemade creams and they are perfect for that. Actually, the sturdiest and best priced container I've found for this purpose.
2259596
I never thought about it but I think so. They are the same bottles as these, and it says they are freezer safe: http://www.amazon.com/Ameda-Breast-Storage-Bottles-Ounce/dp/B003TJAGAS I put my bottles in the freezer regularly (without milk in them) so I can just pull the whole carrying case out of the freezer in the morning and go, and have noticed any deterioration of the bottles.
1026074
Not sure about that. We had trouble with them (4oz)cracking in the bottle warmer so we started using mason jelly jars and they work GREAT ! NO cracking and a lot cheaper.
1172084
They are not air tight - liquids seep out if you turn them on the side. I use them in the frig and for pantry storage but have never used them in the freezer.
745889
They have been safe in a freezer as longas you leave space at top. They work okay in micro wave but I use plastic wrap instead of lid because lids warp with heat. Have never tried to use in oven
846823
Yes to both. Stamped marked on reverse indicates they are freezer safe and I have had success with placing them in freezer. I would however be hesistant placing frozen container into hot water or even the microwave. I would let them warm up abit. They would probably be alright, but that's just my paranoia about rapid temperature change effect on anything.
1618909
I freeze jars all the time. As long as you leave head room for expansion there shouldn't be a problem. Also, no huge temp changes! I wouldn't put hot leftovers in a jar, seal it, and freeze it. Nor take a frozen something out to the microwave or oven. As long as you have decent quality canning jars, they survive well!
1590561
I have not personally tried to freeze anything yet, but they are glass so I don't see why you could not use like a regular mason jar (leave enough space for expansion). Even if you do not use as intended, you won't be disappointed with these little jars. My friend uses the set I gave her for salad dressings because they do not spill the liquid.
2284340
I did use them for freezing, using my vacuum sealer for the jar. seems to have worked well.
39385
They are reasonably air tight. I can tip them over and my yogurt doesn't leak, but you need to make sure they are on snug. I think they'd be good for your purpose. I don't keep my spices more than 6 months anyway. only buy small amounts for that reason. Hope this helps. they are good jars.
1013241
Yes, they are airtight. I shake liquids around in them all the time. These lids aren't for canning purposes, though.