Tumbler/Cold Cup Straw Cover

thingiverse

I created this for the reusable straw (~8mm diameter) of a Starbucks cold cup, not sure if is this a universal thing? I think the size of hole on the lid is not universal so I did not try to lock the straw onto the lid through that. This is pretty self-explanatory so...ignore the poor quality of my print, I used some really crappy filament :P Print with 100% infill no supports. I'd prefer printing with the open side up. I printed this with PLA but I think TPU would be even better.