Waxing warmers are not only for salons and spas. There are several reasons you may want to invest in one over purchasing microwavable containers to do your hair removal at home. Hands down they're more economical and ultimately safer to use than the small microwavable style wax.
First, Let's Talk Cost
Yes, the small microwavable containers are very affordable. They can range anywhere from $3 dollars on up to $30 (compare prices). Although they are inexpensive up front, they tend to get used up quickly and may leak or just not work after being heated up a few times.
The wax pots that are placed in the warmers can be used until the product is gone, and as long as you are using a new applicator for each swipe to the skin and keep it covered when storing, the product remains sanitary.
Wax Warmers are Safer
The most important thing about wax is safety. Microwavable wax can heat very unevenly, and if you're not careful, cause serious burns. It does take more time to reach the desired temperature with a warmer, but at least it heats evenly. (You do have to be cautious if you have a small amount of wax left in the can, as it will be hotter on the same temperature than with a full can if left on for some time.)
The wax warmer (compare prices) also allows the product to remain at a heated temperature until you turn it off. This provides complete concentration for the task at hand. There will be no need to run back and forth to the microwave to reheat the wax.