This cup really sucks! Straw and cup become one with the Strawception Cup. See it in action here.
I wasn't going to share this file since it's nearly impossible to clean and generally a bad idea, but people keep requesting it and I'm not your mom... so you do you :P
Printed at 100% infill with high flow to make it watertight. I used MatterHackers Natural Translucent PRO Series PLA so I would at least not get pigments with my microplastics.