Just to keep slightly on topic, Lance will be eligible to join this forum in just 12 years!
Anyway, have you noticed that when a TdF rider finishes a water bottle, he just throws it to the side of the road?
The other day, I read that one of the TdF riders kept track of the number of water bottles he used on a (particularly hot) stage: 17.
Now some simple math: about 200 riders times 20 stages times 17 water bottles per rider per stage = 68,000 water bottles littering the roadsides of France!
OK, 17 bottles per stage is probably unusual, but it wouldn't surprise me if it were about 5 water bottles per stage. That's still something like 20,000 give or take a few thousand water bottles over the course of the tour.
So here's the question: what happens to all those water bottles?
Do the teams send someone out to pick them up? Are they souvenirs like balls hit into the stands at a baseball game? Do they just stay there? What?