Hoop petticoats?

[whatmakesalady.livejournal.com]

I read somewhere, a couple of months ago in passing, that you can buy hoop petticoats and I think that would be a great idea for the summer (since it gets soo hot) and I was wondering if those are still around or if they would even work to give the right shape. If they do work, where would I be able to buy one? And if anyone has/had one could you post pictures of how they look worn? 

Thank you! :3