I like this build. The author basically melts the bottles down to make a piece of stock, and then lathes it to fit. My 2 cents, I would only use a dedicated toaster oven and pan for this. AND IT WOULD BE OUTSIDE! Just in case of the fumes. The author did this in hi own oven…which makes be a bit nervous.
http://www.instructables.com/id/Make-a-Handle-From-Used-Bottles/