Why do some acne cleansers come in such small containers?

Or whatever the cream stuff is kept in is called. But why are some of them so small? Is it supposed to work faster or something?Why do some acne cleansers come in such small containers?
Usually, they are small quantities because you (hopefully) won't need to use it for long periods of time.





Probably the working ingredients lose efficacy once exposed to air or light, so they won't work as well after long periods of time.Why do some acne cleansers come in such small containers?
because some doctors and makers make enough just to see if you like it
Probably so you run out of it quicker and have to buy more. There don't seem to be any large ';value'; sizes. It's all about profit.