Precious bodily fluids

On Wednesdays Claudia, the dentist at the hospitalito, goes out to schools in the area to administer fluoride treatments. I had the opportunity to tag along one day.
High concrete walls ring all the schools and children of all ages up to about 6th grade attend the same school. The classrooms I saw were roofed, but otherwise open to the air.
At one school I met a boistrous boy who kept on introducing me to his friends, telling me that each one in turn spoke English, which occasionally they actually did. Eventually he decided more amusement came from listening to my attempts at Spanish. When I asked the kids what they wanted to do when they grew up (honestly, I might have asked what he up wanted through), they said that they wanted to work. Not a fireman or politician in the bunch.
Anyway, in the picture I'm pouring out the 5 mls of flouride solution we gave to the kids in disposable cups. They'd swish it around, making various faces of disgust, mischief, or barely-held-in-giggles, and then, after a minute, spit it out.
We carefully washed each one of the disposable cups and reused them at the next school. Ironically enough, we carried the cups in an old box of bandages made by Disposable Technology.
Very few things get thrown out here after their first use -- our grocery bags become trash bags, the otoscope tips get cleaned with alcohol, the toilet paper, well the toilet paper does get thrown away immediately, but doesn't go in the toilet, as the plumbing in the entirity of Guatemala can't handle it. At home I fill up a huge 50 gallon trash container in two weeks. Here I think it would take me several months (that's also with the blessed absence of junk mail).