Step 4: Preparing Mason Jars

 At this point it is a good idea to go ahead and put your mason jars in the dishwasher so they'll be warm by the time your ready to pour in the jam. If you don't have a dishwasher you can heat them in boiling water but it is very important that they be hot when you add the hot jam so the jar does not crack from the temperature difference.
These look interesting! I'd be careful when not canning a whole jar of something as shown in this very last photo. If you don't put enough in the jar, it's harder to get rid of the air and that can lead to spoiled food. <br><br>Make sure that the heat seal doesn't pop after it's been boiled too! The first time I wrote my Instructable I forgot to add that. :P

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