The bowl should work fine especially if you can add some moss or some substrate from the main tank. If you have a cleaning bucket you use for water changes (no soap) that would work also. Hopefully the shrimp you have survivors and won't get too stressed from the relocation. I have some small bowls and "pickle jars" with just some moss and no filtration and the shrimp do well. Just do a weekly 20% water change and don't overfeed.