You fill the container with wax, just like you were making a regular candle, except that it doesn't have a wick. Once it has set up, you poke a hole in the center with a skewer, stick the wick in (no tab), and heat gun it in place. Once that has set up again, you're ready to test. This tabless wick goes all the way to the bottom. Eventually, if you get all the way to the bottom testing this particular wick, it may fall over if there isn't enough solid wax left to hold it up. At this stage you should be fine because there would be maybe around 1/2" to 1" wax left.