Bringing your own cup is also healthier, because paper cup linings are made of plastic that when exposed to hot liquids are likely to turn into microplastics.

Bringing your own cup is also healthier, because paper cup linings are made of plastic that when exposed to hot liquids are likely to turn into microplastics. My rule is: 1) keep hot stuff away from plastic, and 2) assume everything is/has plastic unless you know for certain.