Someone posted about this emergency tool:
It is $19.50 on Amazon with the holder.
They posted this video of how easy it is to use:
I don't know how well this would stay on the visor. I thought that it would be great to put one in my wallet, although I didn't see that there is a raised diamond and then the actual breaker, so I don't know how well it would fit.
People commented that they wouldn't trust it to stay put in an accident and someone pointed out that sunlight would damage it, but sunlight would be on the other side.
Far too many people said to just buy a center punch or emergency hammer. I have an emergency hammer, but it is the largest option that I have seen, and I don't like just tossing it in the glove box or center console.
Someone said theirs came with a floor mount and somebody asked where you get one with a mount and got downvoted.
Several people said "Just carry a spark plug!"
Where would you secure a center punch or spark plug?
Not only that, a spark plug won't break the window, but a piece of broken ceramic from a spark plug will, so you need to keep a shard of sharp ceramic?
How do you make that work?! Toss that in your glovebox or center console and hopefully you will never need it, but you very well may cut yourself multiple times.
You could put it in a little container, but that wouldn't be nearly as easy to find as an emergency hammer, or something stuck to your visor.
If you went with a center punch or ceramic shard you would still want a seatbelt cutter. I didn't see any of those on Amazon, just window breakers with little blades and keychains.
Amazon Basics Emergency Seat Belt Cutter and Window Hammer Tool, Car Accessories, 2 Pack
I have seen people toss around all kinds of prices from a couple of dollars to $10. That is 2 for $10. One guy claimed the proper tool is a dollar or two.
Nobody has mentioned anything of the sort, nor did I see anything cheaper than $5 on Amazon, but I did see a comment about Dollarama.
A couple trolls claimed that thieves would start using these, but people responded that they already have all the tools they need.
"You mean a rock?!"
Then someone posted this:
I forgot that the King of Random tried various ways of breaking windows. They eventually kicked out a windshield, but they seemed to get a good workout out of it.
Nate was able to break a window with a seatbelt, but it took him seventeen tries.
Cali was able to break a window with a screwdriver, but she needed to find the right spot.
They were able to immediately break windows with a center punch.
Some people claimed that something or other was better than a center punch, but I don't know what would be easier than than pushing gently once.
They had a whole Saturn wagon with intact glass and they only had 3 ideas.
They tried rocks and broken ceramic against normal glass and car windows leaning against a wall in another video, but somehow that doesn't seem like a good test.
Hey, didn't I mention Dollarama?!
Someone claimed they needed to stop selling window breakers because people used them for evil purposes.
I cannot find anything about that, just
this thread from 2008 about generic emergency tools because the best emergency tools are generic ones!
They seemed to say that not all of those work, but when they work they work as well as the name-brand one, although they don't necessarily work many times.
Why risk it?!
I did find an escape bracelet for less than $2, but you still need a belt cutter.
Here is a video showing how easy they are:
I shouldn't need to say it, but I wouldn't trust a $2 emergency tool:
Here is the name-brand keychain:
It's $10, while the Amazon emergency hammer is 2 for $10, although people kept bringing up water.
I don't think you can use a hammer underwater. I sure wouldn't want to try!
Why wouldn't a punch work?
However, I think that I like this idea the most:
It is a window breaker, seatbelt cutter, and dual 3.1-amp cell phone charger!
Unfortunately, it is $25, and what do you do when it stops charging, toss this in your glovebox, and buy a cheap replacement?
I need a nap!
I want to mention, though, if you do have an emergency tool, I recommend not leaving it in your glovebox (or trunk!)
If you need a seatbelt cutter...