Old soda bottles! When I was about 10 or 11 I was participating in a Greenup day cleanup in my town and while I was exploring through the woods I found an old Coca Cola bottle that looked straight out of a 1950s movie. Although it was just another piece of trash it was fascinating to my 10 year old mind. The shape and size of the bottle plus the fact that it was made from smooth glass instead of cheap plastic. I decided to pocket this find and brought it home with me after the day had ended. I brought it home and removed the label and washed it till it sparkled. From then on whenever I attended Greenup days or even just walking along the road I would keep my eyes peeled for the glint in the grass that might lead to an addition to my collection.