Kew is one the best Botanical Gardens here. They do a lot of work with orchids.
Royal Botanic Gardens, Kew: Home Page
I'll try and get a photo of one of mine. Yes, I like them because I can put tall plants in them and NOT have them tip over. I do like those plastic ones, though!! They say they are as thick as the terracotta ones, which means 1/4 inch of plastic, so they wouldn't (shouldn't) be as light as a regular plastic pot.
PS. I slip mine into the decorative pots too. I was able to find some fairly tall ones that are designed so that the pot doesn't sit on the bottom in water - that way, I can safely put them back in place after watering without worrying too much about them draining completely.