"Recycle" is the last in reduce-reuse-recycle triad, and though it's an obvious choice for plastic bottles, there are ways to make the most of every bottle. I drink from every bottle for some time and still I slowly make a deposit of such bottles. Many of my friends are not so eco-friendly and they buy a lot of these containers, so there is enough plastic bottles for something bigger to do with them before recyclation.
One of my ideas is something like this - a raft:
Normally I would join the bottles together by some kind of an adhesive tape. It has some advantages - it's easy to use and it can be recycled along with the bottles. But still it's a significant amount of material used with no sensible reuse option (if you know some, it counts for an answer!).
There must be some alternative way to join the bottles using just reused materials and/or materials that can be reused later (preferably but not necessarily if it's salvage is not almost as difficult as the raft construction). Do you now any examples of such a material, tell me!
If some more difficult task is required, please add a how-to paragraph and/or link to some tutorial to do it.