What you will need:
Any container will work. The best have wider base and a small opening at the top to discourage evaporation. Mineral oil can be found at the pharmacy, and the vodka can be as cheap as you'd like, just make sure its not diluted. Although they may look similar, diffuser reeds are not the same as bamboo skewers. They might work in a pinch, but you can find the reeds for a dollar or two, and they're much more efficient.
The mineral oil is used as a non-evaporating base to hold the essential oils. Start by pouring a 1/4 cup of oil into a measuring cup. Then, add 2-3 tablespoon of vodka. This won't mix naturally, so stir throughly to emulsify them. The vodka thins the oils to get it to the right consistency to move up the reeds.
Next, add the essential oil to the mixture. Your ratio should be around 75% base to 25% essential oil. Stir thoroughly.
Then just pour everything into your container, and insert 5-6 reeds. After a few hours, flip the reeds over, and continue to flip every few days.
photo credit curby.