I think Pinetree garden has something like this...... look under planting supplies seed strays :)

Here is a link that might be useful: here

I found these at a store called the Christmas Tree Shops, which is only located in the East. But, I've seen similar at dollar stores locally. I used them for winter sowing, but also used them for when I needed to transplant from styrofoam cups to 4" pots. They have plenty of holes in the bottom, just like you see in the sides.
{{gwi:1259355}}

Thanks for the replies!

But what I'm actually looking for is a container like the water tray pictured in my original post ... something without holes in the bottom ... that way I can water from the bottom *and* have a nice handy container for picking up the plants and taking them outdoors to harden off before transplanting.

I can get the exact 'watering tray' shown above, but only in lots of something like 2,850, which is WAY WAY more than I need.

I suppose I *could* just buy any ol' container to put the pots in, but the ones pictured above sure look convenient.