How many balloons does it take to lift a tiny bottle?

duccio shared how he puts remembrances in the little single-serving vodka bottles that you can find dotting the landscape (at least around here), and he even sent me one, with a crow label. Meanwhile, oiktirmos shared about a school project he recalls, messages in bottles, but set afloat in the air, via balloon, to find out about air currents. A friend in town here remembers doing similar with her students.

I've been collecting the little bottles, with the idea of hosting my book group for a m...