Designing a plastic bottle island/floating platform

[decoguy]

Originally Posted by lewisboats

My suggestion would be quart milk bottles...they are square and can be corralled in nice square-ish shapes while minimizing the non-airspace in each bundle. I would net them in bundles. Put the clean empty bottles in the fridge or freezer and once the air is the same temp cap them tightly. This will keep them from collapsing until the temp gets below the temp that the air was originally trapped at. They will expand a bit as temps go up though. Make sure they are clean and washed out with bleach or something that kills bacteria, along with hot water. Now this stuff will last damn near forever...but you need to have a framework that will also last a long time...sealed PVC comes to mind. Cages of 1" PVC built to hold your mesh bagged bottles would work. The platform above could probably be of wood...or maybe that decking that is hollow plastic (recycled too). The cages would only have to be strong enough to contain the bottles but the framework for the deck would need to be beefy to support dirt, trees grass etc.

Unfortunately PVC is a big environmental no-no!

[Boston]

all plastics are a no no but pvc is likely the worst of all