I re-use glass jars- especially pretty ones. In this case, I had some shot glasses that were contemporary and I also had a cork that fit it just right. You can buy rubber corks at a beer/wine store for super cheap or you can get the real cork material ones at Lowes, Linen n Things or Bed Bath & Beyond. You will need to drill a hole in the top of the real cork ones.
Cork - rubber or real cork
Small Glass Jar
30 drops Fragrance Oil or Essential Oil (I buy mine from Bramble Berry)
Wood Twigs from a tree (keepin it simple) or got wood skewers- they work great too
Cut wood twigs to come out the top 1.5 times the jar length- or there about. Add water to the glass jar 3/4 full, add 30 drops of fragrance oils (you can get creative and blend scents too-- ie Lavender Peppermint, Amber Musk, mix of citrus scents etc.). Swirl with the wood sticks.