The cell/book material did feel flimsy, I thought, but held up well. They're in fine shape for re-using. I wouldn't say they really snap closed. But once they're closed, they're stuffed very tightly into the frame, so there's no way they're going to spontaneously explode open.
I know of 2 companies that sell the ones like you had, without the domes- Lee Valley, and Park Seed used to sell a similar one. T&M was the only place I found the Brittish, domed ones last year. They were made by Haxnicks.
http://www.haxnicks.co.uk/gard...
Gardener's Supply is currently marketing two. It appears one has the dome, the other does not.
http://www.gardeners.com/on/de...
But there might be other companies in the U.S. who offer them?
Karen
