Instead of wasting the glass jars that candles come in, just re-purpose them. After burning most of the candle, leave half an inch or a little less of the wax in the jar. Then put the candle in the freezer once the jar is room temperature (so that it won’t bust).
After an hour or two, take the jar out and use a dull knife to cut into the wax, kind of like you cut a pie. The take the chips of wax and put them in your wax burner!!
****DON’T leave the jar in the freezer too long because I think it makes the jar brittle, and make sure not to use a sharp knife. I am saying this because I busted one of the jars due to both of these reasons… Be careful!!