VerriKerri, with regard to the baby food, you can feed about 50% fruit and 50% vegetables, not necessarily at the same time. Organic baby food is best.
I have been experimenting with feeding protein to my last batch of phoenix worms, in the form of mixed baby food (chicken or turkey mixed with vegetables) and have had some amazing results. The worms are growing larger than ever before! I will post an update with pictures when they reach full size. Proteins should always be mixed at least half and half with fruit or vegetables.
Bailey, either container should be fine, as long as the bread and baby food cover the entire bottom of the container to a depth of about 1/2 inch. Don't worry about the worms drowning in the water; they will be fine; just fish them out as quickly as you can. You can use a small, medium-mesh sieve to rescue them from the water.
When preparing the bread with baby food, add enough baby food to get it nice and moist, kind of like a wet sponge. I promise the worms will not die when they burrow into it! Their burrowing creates little air pockets, which you can see on the underside of the container as they wiggle about. They need to burrow into their food to be happy and feel safe. After transferring the worms onto their food, you may notice a few get lost and climb up the sides of the container instead of burrowing underneath. This is normal. Just round up the strays and tuck them back in!