Trying now to count the various trays I've used over time:
at least two like these:
when in frequent use in the office at work, where it is not trivial to rinse/dry it daily because there is no kitchen, I had trouble with molding; when I was on vacation, or in a satellite office with desert dry air where it gets only occasional use, I'd have trouble with cracking and leaking.
Another bamboo tray, this one,
has similar issues, but I deal with it by putting a table runner (fabric) over the top of the small file cabinet it lives on (helps with the leaks), using a waste bucket so that it rarely stays wet enough to try to mold, and my intermittent rinse/wipe routine can keep up with it, and because the deep form, with the perforated upper tray removed, makes a good carrier for a handful of teacups and brewing vessels to be washed together. I've been looking for something just the right size to replace it.
I've seen variations on bamboo & wooden trays with plastic inserts to hold the water, or the tubes to a separate vessel that goes below the table, but don't like the look of those add-ons, or the thought of the really pretty wood pieces getting scuffed by some of my more rustic teawares. I plan stick to ceramic in the long run from now on.
Then I tried a couple of ceramic trays that were just gorgeous....but one was broken during international shipping, and one just leaked, desipte multiple attempts to close the seams with various treatments, like cornstarch and rice and wheat flours and I've forgotten all the others.
Finally I upped the ante to Mirka Randova's tea trays, and I've been very very happy with them ever since. I have this one:
in a satellite office, and the lines and holes and edge of the removable upper level provide channels for waste water to the base, which holds enough for a day's infusing and drinking. It's just the right size for the satellite office, where it needs to accomodate a limited quantity of teawares at a time (I only keep one teapot & primary teacup there at a time). No leaks, and Mirka and Petr have a lot of experience packaging for international shipping, so this and everything else I've bought from them arrived perfectly intact.
I use this one as my primary tray at home: it lives permanently on my kitchen counter.
It is bigger that the round tray, which helps accomodate both what I'm infusing right now, and one or two pots with a last cool infusion, a drying chasen, a vase if I've got anything in bloom in the garden, etc. And it holds enough water to accomodate a full day of infusing and preheating and pouring over pots, etc.