From other Instructables, the candles that are made end up with small flames and reasonably random burn times. I wanted a commercial grade product that was "as good as new". So we decided to reuse those little aluminium tea lights.
Step 1: What You Need...
1) x2 cheese wax shells
2) x1 used tea light container
3) 5cm / 2 inch of cotton string
4) Source of heat / pan or plastic bag to melt wax
5) Pliers / pincers & a blunt knife
First things first - remove the wick holder from the bottom of the tea-light. It's not glued in, just held down by the melted wax. Use the end of a butter knife to tease it out.
Step 2: Melting the Wax - Making the Tea-light
Place the solid wax into a food/freezer bag and drop, seal the top and drop into a pan of boiling water. Let the wax melt
Using an old, washed out food tin - remove the paper labels first - place the solid wax inside and place carefully onto the hob. Heat until wax is melted.
Now, carefully pour the melted wax into the empty tea-light.
Let it cool slightly before adding the wick
Step 3: The Wick
Take the string and carefully poke it into the wick holder. Use a pair of pliers / pincers to squeeze the holder to secure the wick.
Now dip the wick into melted wax. Dip, remove, dip, remove, dip, remove - three times.
The wax will solidify in seconds.
Step 4: Finishing the Tea-light
You might need to hold the wick down for a few second until it solidifies enough to hold it tight.