3DPrinting

What's the shore hardness on that TPU? Not every TPU is the same.

Most generic printer TPU's are around 90 to 95A shore hardness, which ensures extruder compatibility. It's "flexible" but very stiff. It's best for stuff like compliant structural parts that need to be shock absorbent but still strong.

Stuff like ninjaflex gets down around 40A iirc, which is considerably more rubber-like. However, Compatibility depends on your printer. Ninjaflex is OK in direct drive extruders with the right feed teeth, but pretty tough to get good results out of if you have a Bowden extruder because it will want to bunch up and compress inside the feed tube.

You also have to minimize infill and wall thickness when slicing to get the most flexibility.

Tpu is not Tpu. Lots of reviews on the different types. Using hex or lightening infills at low percentages can help with squishiness. I make footpads for lots of my prints or other things around the house with tpu.

Phone cases are a popular option (always wanted a dickbutt phonecase but couldn't find one on Amazon?)

Bistable auxetic structures are pretty cool.

https://www.printables.com/en/model/604690-bistable-auxetic-structure-parametric-with-opensca

I printed a Fairphoe 4 bumper case in 95A since the origianal was 40€. It's incredibly durable but at the time I printed it using a bowden extruder so I had to clean it up considerably due to stringing. I have a direct drive extruder since today (will post about it soon) and will print another bumper for a family member. I'm excited about how it will turn out

as far as things to print... self-designed TPU covers for phones. to, you know. Show off. Alternatively, there's always all sorts of wheely things with compliant tweels.

or springs, or shock absorbers. I've also found it useful for hinges or things that will be flexing often since TPU doesn't stress like PLA or abs or asa does with extreme flexing.