Or, go get a few PVC fittings... 4" diameter looks cool... and a few PVC end covers and you have a strong basis for a realistic looking Drop Pod. It definitely won't break your gaming budget, and with a few spare bitz you'll have as many as you need.
I've also heard that Gatorade sport drink bottles make excellent pods, and have a unique shape that lends itself well the 40K visual, especially with the inclusion of a few bitz.
Either way, or any way, you choose to go... put some effort into it. Gaming is only a fraction of the hobby. Modeling, Painting, and Sportsmanship are also on equal terms.