The jars from "The Inspired Room" blog always have a filler in them and always have a small votive. Always the same, yet always versatile. Most of the time she just uses Epsom salt as filler. It looks like a candle sitting in snow in the winter, and a candle in the sand in the summer. Use your imagination.
"Yes, you can branch out and use small rocks or candy or cranberries instead of Epsom Salt as a filler. Those are approved and fail proof variations".
How to make a Jingle Bell Jar
Follow all of the instructions for a regular Mason Jar Candle, except wrap the mouth of the jar with jute twine strung with a few jingle bells. If you are a perfectionist, glue the twine down in perfect rows. Otherwise, go for my more unintentionally lazy haphazard look. If you want to really knock yourself out, you can stick some snowflake brads (show in the top photo, found at the craft or scrapbooking store) in the twine and spray with glitter.
More to do with Mason Jars...
Twine Wrapped Jar- How to
Glue twine onto mason jar by applying Liquid Fusion and wrapping twine around. Take care to keep each wrapped round butted-up against the one above, so there aren't any gaps. Once jar is covered, snip off; let dry.
Apply Liquid Fusion around perimeter of jar lid. Smooth piece of decorative ribbon over glue. Cut excess. Let dry.