Just read an article that was basically saying we should consider all gut flora frenemies now. If you don’t eat enough fiber even the “good” kinds that help your body process it will go for your mucus lining, breach the cell barrier and enter the bloodstream. This causes inflammation and may also accelerate aging. Neat.
TLDR; eat fiber and don’t get old.
If the cups aren’t plastic they’re unrecyclable paper amalgamations. Plastic bags were recyclable but now we have reusable ones that aren’t. Or both. Same for straws. They gave up after a year or so around here.