Lay a kitchen towel on the counter. Use the jar lifter to remove a jar from the canner, drain the water back into the canner, and place it on the towel. Keep the remaining jars in the canner so they stay hot.
Use your canning ladle and funnel and add the hot jelly to the warm jar leaving 1/4-inch headspace. Swirl your bubble popper through to release air bubbles, and wipe the rim of the jar with a damp towel to remove any sticky residue.
Center a lid on the jar, and screw on the band until it is fingertip tight. Use the jar lifter to place the jar back into the canner, and repeat with the remaining jars. Try to leave some space in between the jars.
Once all the jars are in canner, adjust the water level to two inches above the jar tops.
Cover the canner and bring to boil over high heat. Once the water boils vigorously, continue boiling for 10 minutes at altitudes of less than 6,000 ft. (adjust processing time for your altitude if necessary – see notes below).
When processing time is complete, turn off heat and allow the canner to cool down and settle for about 5 minutes.
Spread a dry kitchen towel on the counter. Remove the cover by tilting lid away from you so that steam does not burn your face.
Use the jar lifter to lift jars carefully from canner and place on the towel. Keep the jars upright, and don't tighten bands or check the seals yet. Let the jars sit undisturbed for 12 to 24-hours to cool.
After the jars have cooled for at least 12 hours, check to be sure jar lids have sealed by pushing on the center of the lid. The lid should not pop up. If the lid flexes up and down, it did not seal. Refrigerate the jar and use up within a few weeks.
Remove the screw on bands and wash the jars. Label and date the jars. Store your jars in a cool, dark place and use within 12 to 18 months. Yields about 4 to 6 half-pint jars depending on the natural pectin level in your crabapples. Refrigerate the jelly once opened and consume within 2 weeks.