This roundup of Candle making tutorials all use recycled or purpose-bought Mason jars. Mason jars are strong and durable and a great mold or vessel for candles. Personally, I love using the heavy-based Mason jars as they are strong and can withstand the heat of a candle. If you are using upcycled mason jars or jars in general, make sure your candle glass jar is not too thin.
Edited to add: The Mason jar lids that contain wicks for oil lamp burners can be bought here.
Mason jars remained popular during World War II for canning and preserving food. Mason jars are still a favorite amongst the canning community. These jars truly do stand the test of time.
Aromatherapy Candles — CraftBits.com
Crisp Apple Soy Candle Jars: An Irresistible Classic Candle Scent
DIY Mason Jar Apple Pie Candle | My Life From Home
DIY Mason Jar Citronella Lavender Candle- A Cultivated Nest
Make your own scented mason jar candles – Craft projects for every fan!
Evergreen Pressed Rosemary Candles {How to Make Herbal Candles}
DIY Mason Jar Soy Candles »
Mason Jar Candles with Lavender
DIY Peppermint Mason Jar Candles – A Pumpkin And A Princess
Mason Jar Gel Candles
DIY Funfetti Soy Mason Jar Candle