Hmm...I'll try it and see. Sounds simple enough.
UPDATE:
Alright well, I did something pretty similar. I took a smaller tuppaware bowl with a lid and cut a tiny opening in the side just big enough for the frog but too small for the cories and the betta.
Guess who got in?
You got it! My hog-jaws betta got in!

And now he's bloated........
So, here's what I'm going to do for my frog. I have another 10 gallon cycling. When it is done, I'm going to put him in there. I've decided to make that tank a frog tank. Should be fun.

For now I'm going to keep him in a large jar. It's bigger than a fish bowl so he should still be alright. (It's all I have..and yes i'll be cleaning it A LOT.) he might like a break from a filter for a while.
I remember my grandmother was given a
neon tetra and an ADF once. She knew nothing about raising them. They were given to her in a standard fish bowl. She kept them in alive in there for nearly 6 years. I didn't raise fish then so I knew nothing about it either. He'll only be in this jar for about 2 weeks or so. He should be fine.
Mods, you can close this thread.