If you prefer a shower to a bath, shower steamers are a great option. 
Scent: Lavender and Tea Tree (6-Quantity)
Rather than placing them into a tub, the steamer is placed on the floor of the shower. The water activates the fizzing reaction and releases the essential oils into the air.
 
The scent creates a relaxing spa-like shower with uplifting scents.  
The recipe does contain quite a bit of essential oil, because they don’t come in contact with the skin, you don’t need to worry about using too much.
 
Ingredients:  
Baking Soda, Citric Acid, Colorant (Mica) Lavender and Tea Tree Essential Oils