I bought two of these carriers from Amazon, and they arrived this afternoon. They are really nice, and a great buy. I wish I had gotten one size bigger, though, because the cockatiel with a full tail barely fits.
http://www.amazon.com/gp/product/B002LW ... ge_o04_s00I only intend to use the carriers for vet visits. I had a small cage I was using, but had to put both birds into it at the same time, which is hard. And, it was heavy for me. These carriers I think I can get out once a week and put some treats into it. The tiels can then start thinking it's a good place to be. I don't think I would leave it out all the time, because it might be interpreted as a nest site.