To determine the quantity of soy wax you will need, fill votive glass with water and measure that volume. Melt wax in a microwave, following package instructions. Add wax color chips, stirring to melt and blend, until desired color is achieved. For scent, add essential oils to wax (for 3 cups of wax, you'll need about 40 drops); stir to blend.
Set the wick in place: Thread a length of braided wick through a metal wick tab, then "glue" it to the bottom of the glass with a dab of melted wax. Tie wick to a skewer resting atop the glass, so it stays taut and centered. Using a funnel, pour wax into each glass, running the wax over the wick to coat it. Let wax dry and harden thoroughly. If surface dips, fill in with extra wax. Trim the wick to 1/4 inch.