We made our own candles for the vehicles.

We cleaned out a 8 oz salsa jar. We put a bunch of old candle stubs in a tin can. We put the tin can on the camp stove and melted them. We poured the wax into the salsa jar. We then stood a candle stub up in the jar. The stub came to just about the top of the jar. As the wax cooled, it held the stub in place. The wax shrunk a bit as it cooled leaving enough head room to leave a book of matches. The metal lid screws on ensuring that even in the summer sun, wax will not leak out of the jar.

An old scout standby is to use a cat food or tuna can. Cut a stripe of corogated cardboard the same width as the height of the can. Roll the cardboard and place into the can so that you can see the holes. Melt wax and fill can with wax. The cardboard acts as a wick. Cat food cans sometimes come with plastic tops. This actually becomes more of a burner than a candle since you have so much wick.

You could make a multi wick candle in the same manner as first described by putting multiple candles stubs in a cat food can. Fill the space between the stubs with melted wax from other stubs. Keep the plastic top on inbetween used to protect the wicks, keep a book of matches with the candle, and limit wax spillage during hot months in the car.

Of course wicks and wax are available for purchase from craft and hobby shops it you prefer to make your own wicks and are particular about the color of the wax in your emergency candles.