Great fit, secures well so no leaks if tipped over, and easy to remove.

Entrance of the needle hole has been chamfered for easier insertion.. 

Ensure your print bed is clean before printing - as it is a small tall print which needs best adhesion possible (use dish soap and water) 

Print it with PLA/PETG (not made for TPU)

If not using the print profile, make sure a brim is used with 0mm gap, and ensure you orientate with the thinnest face side on the print bed.