While it is possible to can baby food, I do not know of anywhere that makes replacement lids that would allow you to re-use the manufactured jars. Most factory canned foods are not made in jars that are intended for re-use, and their lids are definitely not intended for re-use. I would suggest investing in some widemouth 4 oz canning jars, which are intended for repeated use. This size jar would be a small enough size for baby foods, but takes standard type canning lids. Please don't take chances with food safety. The 4 oz jars are readily available online, and some hardware stores carry them

I would say that the quality of the jars is not high enough to use them to can. I would expect breakage and seal issues.

I think you can, but I don't know that I'd chance the safety issues with a baby involved. You could always reuse them to freeze baby food.

My wife and I looked into this, it said jars that are not specifically made for re-use can swell and change shape with extreme heating/cooling/and re-use and cause very tiny cracks and shards of glass which can get into food.

Also- from what I understand most baby food lids contain BPA, if that might be a concern to you. Using them to hold tea candles could be another use! Good luck!

Definitely go buy some proper canning jars. It's a very small investment. I do reuse our baby food jars to freeze meals. They're also great for keeping house bits - screws, nails etc. Or spices!

or crafting supplies!

Commercial food jars like baby food jars are not recommended for home canning. Reusable home canning jars typically have thicker glass and also have shape-related features that help with obtaining a proper seal. Home canning jars are fairly inexpensive and worth the investment for food safety.

i used them and posted a little diy on how to seal them http://prudentbaby.blogspot.com/2009/11/baby-food-jar-projects-backyard.html
but i only recommend it if you plan on using the food in the first week or so. just for safety's sake...

I use baby food jars to store homemade baby food every day. I even freeze and reheat in the jars. I have had no problems with them.
I use Earth's Best jars from a friend.
If you put hot food into the jars and then cool them, you will often get the pop from the lid, as if its a new jar. Its obviously not shelf safe but sealed well enough for refrig or freezer.

I don't plan to use the jars for years but a few months of use seems doable.
Fear of shards of glass seems unrealistic, as you reuse water glasses, pitchers and other glass items in the kitchen every day without fear of breakdown.

I've not done this with baby food jars specifically, but with other jars such as those for tomato sauce, apple juice bottles, etc., and have yet to have one break or spoil.

I mean, I wouldn't be giving these as a gift, but I use them myself for apple juice, cider, apple sauce (we have a few trees!), and they keep for months. I'm careful to bring the lids to a boil in water, and cook them for 10 minutes before using them again. The jars I just send through a super-hot wash in the dishwasher.

Haven't had a problem yet, and it's really pretty easy to tell when food goes bad, so I'm not concerned. I know others have different standards, but this has been working well for us!

I tried the baby food jars, with the little extra relish that wouldn't fit in 1/2 pints. ...sterilized for 10 min, secured the lids as tightly as possible. The lids just floated away in the water bath. The original seal is not made to do again. Classico jars and any jars that say "MASON" from store-bought food, I reuse them all the time. Standard canning lids fit on those. When in doubt, test with canning rings. (BTW, I've never used a pressure cooker for canning.) Baby food jars are best for dried spices, especially with limited cupboard space.