This is a squirt bottle that I created to apply synthetic oil when I do the maintenance on my 3d printers. It's also been tested to squeeze water out.

It took me quite a few iterations on the prototype to achieve a leak proof design, but this version has been perfect for me.

It contains 20ml of liquid and is small enough to be the perfect tool to reach in tight spaces.

Both parts must be printed in TPU

I've been using TPU 95A and it's worked perfectly.

Note that the cap prints with a support that can be a bit tricky to remove if you use TPU to also print the supports. Use pliers to make sure you get all of it out and create a good seal: