bubble bath 
noun [mass noun]
Liquid, crystals, or powder added to bathwater to make it foam and have a fragrant smell: the gift baskets included bubble bath and champagne [count noun]: avoid toiletries such as bath oils and bubble baths...
- Products available include shampoos and conditioners, bubble bath and shower gel, soap, salts and bombs for the bath, body lotions, hand and foot creams and a selection of gift boxes.
- She could smell strawberry bubble bath on his skin.
- This bubble bath smells gorgeous and it can also be used as a perfume.