I don't rightly know. It's not much, but I want to try to keep that to a minimum as well.
So, starting today for the rest of this week, I'm going to write down everything I throw away during my workday, whether it's actually in my work trash can or not. I'll let you know how I did on Friday evening. Monday's won't be entirely accurate, because I can't remember how many times I went to the bathroom yesterday so that throws it off a little. I do know I probably drank a gallon of water throughout the day, if that tells you anything.