I put one from the fridge into a bottle warmer (I use for breastmilk) and it cracked. Can these not withstand heating? THX
146698
Cast glassware sometimes has areas of stress, the thermal shock of going from cold to hot quickly will sometimes cause fractures.Try letting the jar rest at room temperature for awhile before heating.
146699
i boiled mine for 20 minutes to seal them. they did not crack, but they were room temperature when i put them in.....
146700
I think they can withstand heat; just not from cold to hot. I think most glass is like that.
754682
I think they could maybe handle it in that they wouldn't melt, but they are really thin plastic and would be uncomfortable to hold when really warm. Personally I wouldn't chance it. They're really bad quality.
1814896
I don't think they would withstand the heat. I no longer have the packaging to see what it says on the label though.
1069658
Yes, but don't pour hot water directly into them. Fill them with cool tap water, then heat in a microwave oven to minimize the risk of cracking due to sudden thermal expansion. The same goes for cooling... Wash them only after they have cooled, and don't wash in hot water when they are cold. (I learned all this the hard way.)
362826
I put them in the microwave with no problems. I've even put them on the lower rack of the dishwasher. They aren't the highest quality plastic but they certainly hold up.
664395
Because they are plastic, they would probable become brittle in the freezer. Easy to break. I would not use them in the freezer.
603106
We used them for ice cream. They're thin - I wouldn't try them for anything hot as it would probably melt the plastic.
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.
2071859
They are much like the solo brand you find in the grocery store. If the item is too hot, I suppose they could melt. I read the reviews, and none of the reviewers used them for anything hot.
1959416
No there is nothing stated on them about being microwave safe. Sorry I only use mine for cold stuff. Probably not a good idea to heat any plastics these days. It doesn't even say dishwasher safe??
194859
I have never microwaved them. I only use them for salads. They are made of glass, so I don't see why they wouldn't be for a short period of time. I just wouldn't go from the refrigerator to microwave because of the quick temperature changes. Because they are thin glass, there is more of a chance of breakage.
345713
I use them in my microwave all the time, but just for reheating, never over a couple of minutes. Never had any issues with melting.
1515926
I've had mine for close to a year and no signs of wear or tear yet. I used them strictly for storing and freezing breast milk. They are pretty sturdy so I would imagine they would last a pretty long time as long as they are used properly.
1538770
I have used these in the microwave to quickly reheat liquid for a minute, but have not tried them for any longer. They held up wonderfully. I caution to wash them on the top rack in the dishwasher because the heat from the dry cycle on the bottom rack will warp them. Hope this helps. :0}
1887552
I wouldn't recommend putting breast milk in them. I don't think they'll seal well enough
668868
They are not designed to withstand the "heat" of a microwave. I use glassware in the microwave.
1781029
No ! There amazing , you know how your plate will be scolding from the microwave and the food is still cold ? These actually don't retain heat and heats your food instead , and they don't break , I've loved mine .