I built this out of 1.5 inch pvc pipe and 4mm natural coroplast. The 'Natural' Coroplast is slightly translucent. It's very easy to cut with a utility knife. You might have to go to a plastics supply house or a sign supply house to get the coroplast, not sure if it's a regular home improvement store item. I used self drilling, self tapping screws designed for attaching lath. They have a large head that looks like a built in washer. I didn't glue any of the pipe together, just tapped it together with a wooden mallet or by banging it on the driveway. Kind of tried to keep things squared up as I went along, but nothing is really critical. I always build the top first, then fit the body to it to make sure the body is not too big for the top to fit.
I have included a drawing and a cutting ticket.
You can see an assembly movie here: