Here is a couple of pics of a grow chamber for lowland nepenthes that I just finished. It is 3' wide x 5' long x 4' tall. It is made of 3/4" plywood on all sides, except the front and top of course. I stained and polyurethaned the plywood and then put mylar and plastic all in the inside except on the top. I think that I should have put the mylar on the outside but will change it when the plastic gets old. It was truly a "labor of love". I put plexiglass on the top and it has two pieces of glass on the front in a channel that slide. I just haven't put the handles on yet! Here is the pics: