Egypt 2 Beer puzzle

I can't figure out this beer puzzle. How the heck do I get one dose in one of the two larger jars? I can only manage to get one dose in the smallest jar or two doses in one of the two larger ones but not one dose in either of the two larger ones.

Hi ya', Maple.......Here's a excerpt from the walkthrough that might be helpful:

"I found it easiest to isolate one dose in one of the two larger jars, fill up the little three dose jar, and then add it to the jar with one dose. That appears to be the simplest solution."

Love, Witchen =O)