Yes there is! It's called baffling the filter and there's many ways to do it.
Here's a thread with instructions for making a plastic one as well as alternatives throughout the thread.
Be sure to read the entire thread (or at least skim it) to see other ways of baffling. Once you've done that you can make your own decision as to which way to go. Personally, I went with an aquarium sponge baffle because the water bottle method seemed a little iffy on the safety side.
Oh, and welcome to the forum! It's very friendly here so you've come to the right place :)