Those Lixit bird baths make real nice seed bowls, too, that's what I use for my budgies. Being shallow, they don't build up a layer of hulls that bury the seed below, and several birds can feed at the same time. Easy to remove and clean, too.
To keep them from getting pooped in, and the water trays also, I invented a bunch of covers:
I also have those water tubes, I love them. As long as you position the spout higher than the perch it's next to, they stay clean. (Otherwise they hang their butts over them and poop inside when perching.) They're really inexpensive, between $1 and $2 depending on size, so you can get extras to rotate for cleaning, easy to clean, easy to fill. I have at least 2 on every cage, so that if something happens to one, there is always a back up. I got the 3 oz size (I think it was, short wide ones) for the finches and bigger ones for the parrotlets.