cork
■noun
A buoyant, light brown substance obtained from the outer layer of the bark of the cork oak.
This would indicate to me that there's a limit on available size of a cork piece? I'm thinking of making a specific float out of it. Does anyone know its properties as far as workability with tools, specifically a hole saw? What's the biggest piece I could buy and where?
Is it even worth it or are there synthetic materials that will do the job better past the aesthetic factor?