I collect beer bottle caps. Started a few years ago. I had any idea to make a coffee table or some type of furniture out of them. Unfortunately, drinking beer is much easier than making ****, so my collection has grown to probably in the 10's of thousands. I could fill 3 or 4 5 gallon buckets with bottle caps, hundreds of different kinds from all over the world. Whenever friends or family go on vacation they always save me their caps and bring them home. I bet I got enough to every wall in a bedroom, floor to ceiling. Someday I will do something with them, until then it's just an excuse to keep drinking beer.