The jojoba beads are used in scrubs, shower gels, soaps as an exfoliate. For shower gels it says to use 2-4 tbsps. per gallon or 1/4 -1/2 tsp. per pound of soap. So a little bit of them will go a long way. As for the bath bomb base you should be able to do a search for bath bomb recipes and use the liquid amounts that are listed I would think. HTH