I made myself some herbal bath teas recently. They were really easy to make and are a lovely addition to a nice warm bath. All you have to do is place the bag in a glass bowl and pour hot water over it and let steep for 10 minuets before adding to the bath. I like to keep the bag in the bath as well, occasionally squeezing it release more tea. I made the rectangular bags out of muslin that I picked up from Spotlight and placed 25g of herbs inside.
I used these the following herbs in equal parts for my bath teas: