Melt Your Wax
Using some kind of double boiler set-up, melt your wax. A good target temperature is 170-175° F. Once your wax has completely melted, add any additives you have selected and mix thoroughly.
Add Wicks To Your Containers
Straighten your pre-tabbed wicks out. Apply hot-glue to the base of the wick tab and press the tab to the center of your container. For deeper containers with smaller openings, you can use something like chopsticks to guide the tab into place.
Secure The Top Of Your Wick
Container Candles by Notahandbag
You will need to provide some sort of support to help keep the wick centered while the wax is cooling. For smaller containers you can use a clothespin to hold the wick in place, or, for larger openings, you can loop the wick around a wooden skewer.
Preheat Your Container
Place containers on a cookie sheet lined with foil or parchment paper for easy cleanup. Heat in the oven at 150° F for 10 minutes. This step is not absolutely essential, but it will provide a nicer finished product with less air bubbles.
Fill your container to the desired level. If it is a container with a lid, remember to fill it only to a level that will leave enough room for the lid to properly fit back on the finished candle. Be sure to set aside some wax for step 6.
Allow the wax to completely cool before proceeding. Slow cooling generally provides the best results when it comes to container candles. So, don't attempt to accelerate the cooling process.
When your candle has cooled, you will see that it has sunk in the middle a bit. To cover that up, you will reheat the wax that was set aside in the previous step. Heat the wax to 185° F so that the wax will be hot enough to adhere to your candle and hide any seam lines. Pour the heated wax into the candle so that it barely covers the wax from the first pour. Allow to cool.
Gel Martini Candle by Dizzy Girl
Once your candle has completely cooled, remove the wick support and trim the wick to ¼". Be sure to scrape off any stray wax drips.