1 pound of bees wax and one toilet bowl wax ring. Melt together and pout into small Dixie cups. You will have a lifetime supply for yourself and all of your friends.
If you don't have a supply of beeswax you can buy a pound at Michael's craft store and any other craft store that has candle supplies.
Michael's sells it for about $12 a pound so wait until they have one of those half off coupons in the paper and buy it at a more reasonable price.
I buy it from a local beekeeper for $1.50 a pound.