you only need one per bath! It takes the entire bathing time for the bomb 💣 to completely burst! It smells good from the beginning, before it burst. If you get impatient you can allow the bomb to get soft and silky then gently squeeze it UNDER THE WATER 💧!!! if you bath fast before it burst, just take it out the tub till next time. I have over 8 varieties so you’ll get different ones. This is luxury bathing!