I always try to bring my own cup when I get a drink to go because I hate using plastic cups. They are bad for the environment in every possible way - they are made from oil which is attained through fracking, manufacturing them produces lots of greenhouse gasses, and they end up in a landfill or in the ocean and don’t ever decompose. On top of all this, they contain carcinogens which, if left out in the sun for too long, an seep into your drink and possibly lead to cancer. Mason jars or other reusable to go cups are a great alternative - spread the word!!