if they are good or not depends on your perspective. Say, is good only profitable to you?

Ive never even done bake sale. I have better ideas that I could likely make into a business but I have no idea how.

what to do with the crap left behind?

Sell it? Bill gates open sourced a design for this. Easy enough to put together enough cash to build one. Unfortunately its just not viable.

we have bioplastcs they are just not popular. why i don't know.

Same problem. I mean not-paper-straws. Like an alternative of plastics that is simply superior.

There is some cool tech that squeezes your legs to compliment heart beats. It apparently does miracles for health.

I have experienced that for a brief time. No idea how good it was.