Your assumption is correct. It's just a small amount, but I tried using it for a little scape the other day and was able to get quite a bit to come out. I was surprised.
My toddler and I are both feeling a little under the weather and I am wondering if it's a good idea to use the milk to help him build his antibodies? I quit breastfeeding long before I wanted to (at 19 months) for reasons that were beyond my control. I hate not passing all of those antibodies on to my son and am tempted to pump some of the milk to give to him with his bottle, to give him a little immune system boost. Is this weird? What will it do to my breasts? Do you think I will produce more and will they become engorged? Have any of you done this?