That clamp idea works for glue bottles as well.

When wanting to make a 90 degree cut to a piece of wood, I get a block that has a 90 degree angle and put it against the fence. Then I clamp or grip the piece tightly against the wood block as I run it through the saw blade. I get a perfectly clean cut.

If I need to trim the wood to a specific dimension, I adjust the fence to the approximate spot, then use cardboard shims to trim it successively until it's the correct size.

I like this better than using a miter gauge, since this gets out of whack and also because the piece can slide during its run through the saw. You do have to be careful with your hands using my method.

Click here to view attached image.

Great tip, thanks Inlver

Cutting a piece of wood that size (ratio) on a table saw with that method is asking for trouble! No matter how many times you've done it and never had a problem. If it shifts at all, it will bind between the fence and the blade and then fly back at you. Sometimes with serious consequences.
As a professional woodworker I would NEVER recommend that method.
If the piece was 3x as long as the width you're cutting it would be ok.
One good thing about the photo is your saw blade is only slightly higher than the piece of wood which makes cutting a finger off less likely.

You can spend thousands of dollars getting into specialty silicones and injection molding... but if you want an ULTRA CHEAP way to experiment with rubber props, nothing beats proto putty. It's just silicone 1, corn starch, and a few drops of food coloring. https://youtu.be/7fwytA5r2Mw
The guy in the vid only hand shapes it or uses it in a mold... but you can also use it to create a mold. You're not going to get intricate designs to come out, but if you want a rubber hammer for ten bucks, this would be perfect.

I've had so much fun using this stuff guilt free with no "waste anxiety" over expense.

Edit: I forgot the best part! It's instant gratification. The stuff hardens straight away.

WOW. Super cool. Thanks for sharing. What have you made with proto putty?

You're welcome! It's so much fun! And I've made all sorts of stuff with it... the easiest thing I made is also my favorite. I'm a TERRIBLE magician, I belong behind a work bench... but even I get great reactions with this. I made the tongue out of proto putty and I needle felted the tail. https://youtu.be/lKsg_UostNY This gag is actually really good... I need to get a better performance on vid to do it justice 😂

This is a great way to make a budget track saw. Just remember your saw kerf, and that the bit under the track is the part being saved. I've cut pieces a kerf-width too short too many times. Now I always put a little X on the scrap side of my measured marks so I know which side is scrap and make sure the blade is on that side. If you don't see the X, don't cut.