Recycle those land fillers. I wanted to put the video which is at the end of the link-“hopefully.”- on here, but could not figure how to do it. The video in quick time shows a lot of simple ways to upcycle bottles like those below. Really simple stuff, you might want to try like I do. I Especially like the little plant one; Pretty cool. Have fun and let me know if you do anything with this. Also the video is in what I think is Japanese. It is easy to follow by mere watching of it though.