I figured it out. You right click on the item and select "use" and then it gives you whatever the appreciation is for that particular aid mission you did.
Thanks for posting a followup when you found the solution. I've been wondering the same thing and actually had several of my "offerings" accidentally consumed and your post came up when I was searching for the answer.
If this forum had reputation, I'd be giving you +rep but I don't see such an option. But I wanted you to know you helped me out.