I created this little adaptor so that a yeti rambler jr could be used in the goveer kids tray that latches onto the wagon. This does not exclude it from being used for other size cups. See “sizing”.
https://www.yeti.ca/drinkware/bottles/kids-bottle-355ml.html
https://goveer.com/en-ca/pages/cruiser
See attached pictures. The bottom of the adaptor is 70mm, gradually increasing in diameter via a loft. The max width acceptable for the cup would be 77.5mm as that is the inner diameter of the top portion of the adaptor.
Cut the top of the model off in your slicer and print a test fit!
I did not use any and due to the nature of the design it is not necessary.
I printed on a Mk3s+ with PrusaSlicer using black PLA.
The author marked this model as their own original creation.