Shower steamers are a great alternative to a bath bomb.  Lemon steamers are scented with aromatherapy essential oils and provide an energizing feeling.  You will use these while standing in the shower.  Place steamer on the floor of the shower in warm/hot water as desired.  Once steam starts to accumulate in shower you can place the steamer on the ground approx. two feet away from drain.  Slowly inch steamer toward the drain until you reach the desired potency of the scented steam.  If the steam becomes too potent move steamer away from drain.