Why Is Jam in Glass Jars?

Glass is Heat Resistant: Since glass jars have the quality of being extremely heat resistant, the jam product packed in it stays the way as it was supposed to be even at very high temperatures like 400 celsius. ... Hence using glass jars may make consumers buy your product regularly and can surely enhance customer loyalty.

Can you put jam in plastic jars?

There's no need to sterilize whatever you want to put the jam in, as with water-bath canning, but it should be clean. ... You can even use plastic so long as you let the jam cool first before pouring it in to avoid melting anything. A refrigerator jam isn't going to last forever.

Do you have to put jam in jars?

The answer is no. You can make any kind of jam/preserves/etc. without lugging out your big-ass stockpot/canner pot. Just don't make a bunch of it because you'll need to eat it up lickity split (within 3-4 weeks).