For those who go out for coffee, Do you bring your own cup ?

You go to your local coffee / tea takeaway place , do you use your own cup ? . Or do you continue to use their cups and throw them away , maybe you reuse them but chances are they go in the bin or on the street . If you don’t use your own cup would you start to , not one coffee house would refuse to fill it . They and you would be helping with waste , and you may even get it cheaper if you saved the shop money even tho it may be a small amount on orders for cups .
People go on about reusing water bottles and buying a proper one to use , i am one of them but maybe those who drink coffee / tea should think about it also .
You might even get more in the cup depends the size of cup and it will stay hot for longer , so no wastage of your money or coffee .
It’s worth a try at least , isn’t it ?