This print is for a Graco jogger. I'm not sure of the exact model (we've owned it for years), but it looks to be similar to the current Graco Fasaction joggers. I modeled the connector off the original cupholder, which fits drinks no larger than a canned drink. Two models are included, one for taller cups and one for shorter cups. Both models have a slot down the side to support cups with handles. Lastly, I drilled holes in mine after printing and inserted rubber tabs that I had leftover from the excellent KEMIMOTO Universal Car Cupholder (not an affiliate link), which stabilize cups in the middle of the cupholder.
The author marked this model as their own original creation.