I recently bought a set of reusable stainless steel straws. They were expensive, but have a timeless "design" and have a build quality that gives the impression they will last a lifetime. When dirty I throw them in the dishwasher with the other cutleries. They don't take any space in the washer so cleaning them is essentially "free". (Making abstraction of the ecological cost of a dishwasher.)
Honest question: How many plastic straws do you have to save to offset the CO2 cost of building a steel straw? Also, are paper straws really better, CO2-wise?
Considering how many vehicles and buildings are built with steel on this planet, I'd bet that the volume of steel needed to provide every person on earth with a steel straw once wouldn't even be noticed by the steel producers.
Actually, I just took a few minutes to look a couple things up and did the math. The US today likely recycles more than 6M tons of steel every year (it was 5.8M and rising in 2014), and a ton of steel can produce around 40K straws, if I divide one ton by the weight of a steel straw I saw on Amazon. This means we could produce steel straws for all on earth with about 200K tons of recycled steel, or less than 4% of the steel we're recycling every year in the US alone.
Note the steel industry and the EPA have somewhat different numbers for amount of recycling, it may be due to US vs global recycling, but I went with the EPA's which is more conservative.
I don't know about Taiwan, but note that metal recycling in the US is currently twice the weight of metal recycling, and plastic is twice the weight of land filling compared to metal; in other words plastic is a much larger problem.
https://archive.epa.gov/epawaste/nonhaz/municipal/web/html/
https://www.epa.gov/sites/production/files/2016-11/documents...
https://www.steel.org/~/media/Files/AISI/Fact%20Sheets/50_Fu...
With these things in mind, I'd personally be pretty surprised if a steel straw that lasts 10 years wasn't environmentally better (and by more than a little) on all scales than plastic straws for someone who drinks a soda with a straw every day for lunch.