Bathroom Etiquette

I found out about this Japanese product that eliminates toilet odors from my relatives.  You drop 2 to 3 drops in the toilet right BEFORE you use the toilet and the drops magically help to make the odor less.  Not sure what it does.  Have one of these little bottles in all my bathrooms.  I gave one of these to one of my friends, who has a place that has only one bathroom, and she said it worked wonders.  I went to Mitsuwa the other day and I was surprised to see they now have the packaging in English.  I never saw the packaging in English before!