The

Squishfour.

The Squishfour is a nice and squishy thing that somehow doesn't need TPU. It uses PLA.
This thing is a great squish toy for people on a low, low budget that can only afford PLA! You don't even need a droplet of TPU, because the mechanism behind it is simple and is a mechanism, that is based off real occurrences, which of course, should work. And of course, as the saying goes, "If it works, it works."
This little thing has a pretty long story behind it, and below this is the long story behind it!

Squishfour Story

I was making fridge magnets as usual with magnet holes and it was all normal with supports and such. Then I realized the supports... Kinda squishy! I also saw that the glasses I 3D printed... the part close to it would oscillate when plucked, like a guitar string! On PLA!
Then I remembered that. The Squishfour had 3 failed iterations, No. I had rectangles but slicer sliced it differently than supports, No II had springs but supports were too much, then No III failed by too much a gap!
After that, the fourth version came to life which was just No III but with less gap. And now it squishes!
I also provide the squish from v4 for use. Gimme credit for it though! I like CC-BY-SA so give credit!

Wait a minute...

The one that works... is v4. 4 is four. FOUR is in Squishfour... OH MY GOSH V4 WAS MEANT TO BE THE ONE OH MY LICKEDY SPLIT GOSH-

Side note

The squish isn't fully developed. This version isn't fully squishy.