I had a couple of the bamboo ones but they ended up leaking. In the end I bought a more expensive one from YUM tea on ebay.
There no glue in the top piece as its a single piece of wood and has a pull out plastic tray, was expensive but had it for a year now and it looks like new still. Used everyday for 100s of gongfu sessions. Its basically been permanently wet for a year http://img69.imageshack.us/img69/8348/cimg7221.jpg
Really a nice one - should think about an ebay-account.
Seems like everybody is buying his teaware and tea there
But tray or not - I think I really need a water-bowl too. Something in me doesn't like the idea of setting my tray under water - even though they are made for this.
And yes I think I'd use it rather as a normal tray - for serving my tea, transporting and so on.
Perhaps a nice placemat would do a good job too.
I have time to think about it, because the tray at Andao is still out of stock.